Answer:
If a blue-eyed offspring forms from black-eyed parents, the blue-eyed trait must be recessive.
Explanation:
The blue-eyed trait is the recessive one because otherwise it could not come from parents with black eyes. A recessive trait is only expressed when both alleles for that trait are the same, and can only come from parents with the same trait, or heterozygotes.
In this case, both parents must be heterozygous, i.e. carriers of the recessive allele. If black eyes is B and blue eyes is b, then the genotype of the parents would be:
♂ Bb♀ BbIn a Punnett square can be seen the crossing:
Bb X Bb
Alleles B b
B BB Bb
b Bb bb
Where the offspring could be:
Bb black eyes 50%.BB black eyes 25%bb blue eyes 25%Therefore, if blue eyes is the recessive trait, as if it were the dominant trait it could not be the product of black-eyed parents.
The study of a living being is called biology.
The correct answer is recessive genes or mutation.
The character in the living organism is due to the gene present in the body. The genes are present in a pair. The single gene is known as an allele. The two alleles are as follows:-
DominantRecessiveIn this question, the parents have a black color eye but the offspring has blue color eyes. This is due to recessive gene inheritance because this gene is dormant in their parent and shows its character in this generation.
The chances of this case are 1/4 out of total.
The mutation is also the reason for the blue eyes because the abnormal change beside the population is called a mutation.
Hence, the correct answer is Recessive and mutation.
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Answer:
16. Control group: Subject A
17. Independent (manipulated) variable: Type of powder
18. Dependent variable: Itching time
19. Explain whether the data supports the advertisement´s claims about its product. Yes, it does.
Explanation:
Control group: The control group is used to identify if there are any other factors influencing the results obtained by the treatment in the study (in this case, the new product), from the results that might be a consequence of other factors. The control group must be selected from the same population as the treatment group. Data from an experimental group are compared with the data from a control group. These two groups are identical in all aspects except for the independent variable that the researcher changes in the experimental group to observe how they affect the individuals.The experimental group is the one that receives the experimental procedure, with changes in the independent variable. There can be several experimental groups. In this case, the experimental group is subject B.
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, the type of powder is the independent variable. Dependent variable: Refers to the variable, which response depends on any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y. In the exposed example, inching time is the dependent variable, that depends on the type of powder used. The data does support the advertisement´s claims about its product. The effect of the new product lasts 50% more than the original product. The old powder produced itching for 30 minutes, while the new product produced itching for 45min (15 more minutes, 50% more).Why is genetic diversity higher in big cities than in small towns?
Answer:
cities are more likely to have a population of people from other places while small town don't really have a Flux of population so it stays smaller
There is a genetic diversity higher in the big cities than in small towns because of the diversity of population that is present in it. The diversity brings out the different type of population in them.
What are the various factors that determine the population as well ?These are the availability of resources with the type of temperature and the environment that are determined in order to see the type of population present in it.
Genetic diversity is just influenced by the population size along with the with smaller populations that are having an increased probability of the inbreeding with the genetic drift and potential fixation of the deleterious types of alleles which just decreases the genetic diversity along with the adaptive potential.
Higher population of the genetic diversity that is in abundant species that is likely happening due to the combination of the demographic factors that are including the larger types of the local population that are in sizes with the faster generation times along with the high rates of the gene flow with the other type of populations.
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1. Which of the following are carcinogens (risk factors that are known to cause cancer)? a. harmful chemicals
b. genetic factors
c. excessive exposure to UV rays
d. all of the above
e. none of the above
Answer:
d. all of the above
Explanation:
10. What was the result when Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly?
Only male offspring had red eyes
Half the offspring had white eyes.
All the offspring had red eyes.
All the offspring had white eyes,
Answer:
When Thomas Hunt Morgan mated a white-eyed male fly with a red-eyed female, he came to the startling conclusion that the trait for eye color was located on the chromosome that determines sex. ... F2 generation: The offspring showed a ratio of three red-eyed flies to one white- eyed fly.
Explanation:
Answer:
all the offspring had red eyes.
Explanation:
gradpoint
Which of the following natural resources is NOT formed from dead animal and plant materials that have been buried and compressed
Which of the following provides the best example of artificial selection?
O Scientists have noted that different varieties of birds on different islands have beaks
that are suited to each bird's available food.
O Leopard seals captured in Antarctica have thicker layers of blubber than harbor seals
captured in the Pacific Ocean.
O Hummingbirds have a long, narrow beak that enables them to reach food in the
deepest parts of a flower
O Racehorses that run fastest are the ones that are allowed to produce offspring, leading to faster racehorses.
Answer:
O think it's either B or D
help asap!
DNA polymerase is an enzyme required in DNA replication. Its role is to synthesize DNA, adding individual nucleotides to each strand of newly synthesized DNA with the help of other enzymes such as primase and ligase. There are several families of DNA polymerase in both prokaryotes and eukaryotes, but through different species, portions of DNA polymerase are highly conserved. What do you think is the evolutionary significance of DNA polymerase? What do you think would happen if there was a genetic mutation on the genes encoding for DNA polymerase?
A sample answer would look like this: The DNA polymerase has evolutionary significance because it is required for DNA to be transmitted across generations. A genetic mutation in a gene encoding for DNA polymerase could lead to significant flaws in DNA replication, which could lead to major flaws in the DNA replicated for cell division. This could lead to large-scale errors and result in the death of the organism.
Answer:
Abstract. DNA polymerase I (pol I) processes RNA primers during lagging-strand synthesis and fills small gaps during DNA repair reactions. However, it is unclear how pol I and pol III work together during replication and repair or how extensive pol I processing of Okazaki fragments is in vivo
Explanation:
Answer:
DNA polymerase has evolutionary significance because it is required for DNA to be transmitted across generations. A genetic mutation in a gene encoding for DNA polymerase could lead to significant flaws in DNA replication, leading to major flaws in the DNA replicated for cell division. This could lead to large-scale errors and result in the organism's death.
Explanation:
Help -
this is important sksk I’m taking a test and I need a good grade
Will mark brainliest
Answer:northeast
Explanation:
Are there organisms that can be abiotic and biotic? Explain
how sexual reproduction plays its role in avoiding genetic monotomy
Answer:
Abstract
The relative contributions of sexual and asexual reproduction to the genetic structure of populations can be difficult to determine for fungi that use a mixture of both types of propagation. Nuclear RFLPs and DNA fingerprints were used to make indirect and direct measures of departures from random mating in a population of the plant pathogenic fungus Mycosphaerella graminicola during the course of an epidemic cycle. DNA fingerprints resolved 617 different genotypes among 673 isolates sampled from a single field over a 3-month period. Only 7% of the isolates represented asexual clones that were found more than once in the sample. The most common clone was found four times. Genotypic diversity averaged 85% of its maximum possible value during the course of the epidemic. Analyses of multilocus structure showed that allelic distributions among RFLP loci were independent. Pairwise comparisons between individual RFLP loci showed that the majority of alleles at these loci were in gametic equilibrium. Though this fungus has the capacity for a significant level of asexual reproduction, each analysis suggested that M. graminicola populations maintain a genetic structure more consistent with random-mating over the course of an epidemic cycle.
What type of cells develop into a variety of cells, all with different structures related to their
different functions?
Answer:
stem cells
Explanation:
stem cells are able to become any somatic sell; blood, lung, heart, etc.
Which pair of structures would provide a positive identification of an animal cell under a microscope?
Answer:
lysosome, flagellum
Explanation:
Took the test & it was correct. See picture below.
QUESTION 5
How does a plant cell split into two new cells?
Plants cells do not go through cytokinesis
A cleavage furrow forms
A cell plate forms
The cell pinches in
how to find the phenomenon of an essential question?
Answer: By reading and revising the literature based on phenomenon or by performing an experiment.
Explanation:
Essential questions are those key questions that can be asked from the students or the students can ask those questions after the lecture about a specific topic. The essential questions are asked by the teachers to determine the focus of the students on the lecture and how much information they have retained. This helps in improving the explanation ability of students. The essential questions are related to the phenomenon and it can be answered and find by recollecting what has been taught by the teacher, reading and revising the literature related to the phenomenon. These can also be answered by performing a scientific experiment.
When you exercise or sunbathe, you sweat. that sweat eventually evaporates. Why does this occur
Answer:
The sweat leaves your skin through tiny holes called pores. When the sweat hits the air, the air makes it evaporate (this means it turns from a liquid to a vapor). As the sweat evaporates off your skin, you cool down.
Explain why the passenger pigeon,which was once the most abundant bird in north America,disappeared completely.
Answer with Explanation:
The "passenger pigeon" used to be North America's most popular bird. Their population even reached 3 billion (or even more). They always traveled together. Their decline in number was noted in the 19th century. People became interested in hunting them for food because they were relatively cheap and tasty . They were also a great source of protein. It was easy to hunt them down although they could fly very fast because their flocks were huge in number. Some people killed them because they didn't want the birds ruining their crops. Their nesting grounds were also disturbed, which ultimately drove them away from the forests. People were overkilling them, and this sped up with the advancement of technology. The number of pigeons killed outnumbered the newborn pigeons, and after decades of hunting them down, their number dwindled with the last one passing away in 1914.
What are the three major phases stages of the cell cycle?
Answer:
Interphase Cytokinesis .MetaphaseEach do and have different parts while doing different things.
Explanation:
I looked it up..
Hope this helps you out!
Answer:
the three major phases are:
Explanation:
1) interphase
2) cytokineses
3) metaphase
Help help help! It’s due in a few mins!
Answer:
1. the first one is 5
2 . the second one is 1 or 2
3. this third one is 4 or 5
4. the fourth one is 1 or 2
Explanation:
ik i did not really help, i need help with this too. bur just try ur best!!
(Giving brainliest!!)
What are the 3 common characteristics of planets? Describe one of the characteristics of one of the planets in our solar system
Answer:
The solar system is host to two broad categories of planets. The four closest to the sun — Mercury, Venus, Earth and Mars — are the terrestrial planets. They have rocky surfaces enclosed by relatively shallow atmospheres. The gas and ice giants — Jupiter, Saturn, Uranus and Neptune — are outliers. They are much larger than the terrestrial planets, but their cores are small and icy. Most of their size is formed by a combination of gases that become denser and hotter as you get closer to the core. Scientists count eight planets overall. Pluto was reclassified as a dwarf planet in 2006.
Explanation:
Which best describes how an enzyme affects the rate of a chemical reaction? Group of answer choices It changes the products created in the reaction. It increases the temperature of the reaction. It causes the reaction to proceed in an unfavorable direction. It lowers the activation energy of the reaction.
Answer:
It increases the temperature of the reaction.
Explanation:
Enzymes increase the speed of the chemical reaction. The reaction usually gets faster when the temperature is high. As a result, I think that this is the best choice of all.
On Friday, you play Xbox Kinect Dance Central 2 through the night. The next morning you try cutting the grass but your arms, legs, and back ache. You are “in a fog” and forget to add gas to the lawn mower, your vision is blurry, and you are somewhat irritable. What happens in your body to recover from sleep deprivation?
Answer:
During sleep your body heals itself and restores its chemical balance. Your brain forges new thought connections and helps memory retention.
Explanation:
hope dis helps
1. What kind of plant life dominates the coniferous forest biome?
A. deciduous trees
B. grasses
C. small shrubs
D. cone-bearing trees
Answer:
Small Shrubs
Explanation:
They Give off energy that makes them dominate the coniferous forest biome
The dominant plant life in the coniferous forest biome are cone-bearing trees, also known as conifers.
What is a coniferous forest biome?Coniferous forests are found in areas with cool, moist climates, such as the taiga regions of North America, Europe, and Asia. These forests are characterized by their dense stands of evergreen trees that are adapted to the long, cold winters and short growing seasons of their native habitats. The most common types of conifers in these forests include species of pine, spruce, and fir.
Conifers are easily recognizable by their distinctive needle-like leaves and reproductive structures, which are cones that contain the seeds. These adaptations allow conifers to conserve water, resist cold temperatures, and reproduce efficiently, making them well suited to the harsh conditions of the coniferous forest biome.
In contrast, deciduous trees, grasses, and small shrubs are more commonly found in other biomes, such as deciduous forests and grasslands.
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hey guys I wanted to ask when is spring cleaning because my parents think it occurs in the middle of January
Answer:
april
Explanation:
Answer:
April 1st
Explanation:
How might the fennec fox's population suddenly Increase? How might this affect the ecosystem?
Answer:
If rabbits population (prey of fennec foxes) suddenly increase as well. The other prey of the fennec foxes would shrink in population because there would be more fennec foxes to eat them. This would at some point even out and the ecosystem would go back to normal.
All____species are dangerous to ecosystems
Answer:
invasive
Explanation:
hope it's help
Which phrase defines altitude?
how tightly molecules are packed
a column of air pushing on an area
the force pushing on an area or a surface
the height of a given point above sea level
Evolution of the atmosphere
Describe and explain how the earths atmosphere evolved.
Answer:
Answer is on the pic
Explanation:
I hope it's helpful!
Many common products, such as wooden furniture, paper, and books, are
made from trees. Which of the following is a likely consequence of humans
cutting down a forest in order to make use of the natural resources there?
A:destruction of animal habitats
B:increased acid rain
C:increase of light pollution in cities
D:decrease of chemical runoff into oceans
Please help with my home work
Answer:
Many common products, such as wooden furniture, paper, and books, are made from trees. This act of human being causes the destruction of habitats. Explanation: The term trees, forest, plants etc are used to denote those living organism which follows living mechanism which states that live and let live
Explanation:
A common running-related inflammatory injury of the extensor muscles and
surrounding tissues of the lower legs is called
O shin splints
O muscle sprain
O myopathy
tendinitis
Answer:
Shin Splints is the answer to your question
Iron rich deposits that formed about 2 billion years ago have red layers. Layers formed before then were not red. The red layers formed when oxygen made during photosynthesis reacted with iron molecules in the ocean. The oxidized iron formed layers of sedimentary rock
. Which BEST summarizes this phenomenon?
A. The lithosphere changed the atmosphere. B. The hydrosphere change the atmosphere.
C. The atmosphere change the biosphere.
D. The biosphere change the lithosphere
Answer:
D. The biosphere change the lithosphere
Explanation:
The red formed due to oxygen which is produced by plants in the process of photosynthesis. This oxygen then reacted with iron atom and formed oxidized iron layers of sedimentary rock. So here plants are responsible for the formation of these layers and we considered plants as part of biosphere so we can say that biosphere is responsible for the change of lithosphere.
Answer:
D. The biosphere change the lithosphere
Explanation: