Answer:
Recombination frequency, P = 0.23.
If the recombination frequency is < 50%, genes are linked. A RF of 23% tells us that these two genes are in the same chromosome, close enough to be linked.
1% of recombinations = 1 map unit23% = 23 map unitsThe genes for stem color and fruit type seem to be in the same chromosome, linked and 23 MP apart.
Explanation:
In the present example, the genes for stem color and fruit type seem to be linked.
To know if two genes are linked, we must observe the progeny distribution. If individuals, whos genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1. If we observe a different distribution, that is that phenotypes appear in different proportions, we can assume that genes are linked in the double heterozygote parent.
In this way, we might verify which are the recombinant gametes produced by the di-hybrid, and we will be able to recognize them by looking at the phenotypes with lower frequencies in the progeny.
The following distribution of offspring is observed:
normal fruit, purple stems 38.5% fasciated fruit green stems 38.5% normal fruit, green stems 11.5% fasciated fruit, purple stems 11.5%38.5% + 38.5% + 11.5% + 11.5% = 100%
N (total number of individuals in the progeny) = 100
number of individuals with normal fruit, purple stems 38.5 number of individuals with fasciated fruit green stems 38.5 number of individuals with normal fruit, green stems 11.5 number of individuals with fasciated fruit, purple stems 11.5To calculate the recombination frequency we will make use of the next formula: P = Recombinant number / Total of individuals. The genetic distance will result from multiplying that frequency by 100 and expressing it in map units (MU).
P = Recombinant number / Total of individuals.
P = 11.5 + 11.5 / 100
P = 0.23
We need to know that 1% of recombinations = 1 map unit = 1cm. Also, the maximum recombination frequency is always 50%. This means that if the recombination frequency is < 50%, genes are linked. A RF of 23% tells us that these two genes are in the same chromosome, close enough to be linked. FR 23% = 23 UM.
During photosynthesis, what is the source of the carbon in
the sugar (C6H12O6) that is created?
Answer:
Carbon Dioxide
Explanation:
PLSS HELP how is gene knockout similar to gene sequencing?
Answer:
Gene knockout is a technique used to determine the function of a gene that has already been sequenced, which is achieved by analyzing the phenotype of the individual carrying the knockout mutation(s). Moreover, gene sequencing is a technique used to determine the sequence of a given gene, which allows to determine how gene variants (polymorphisms) may be associated with the phenotypes of the target trait.
Explanation:
In genetics, gene knockout is a technique used to trigger mutations in a (already) sequenced gene in order to inactive its function and observe the resulting phenotype for a particular trait. This approach that starts with the inactivation of a given gene and ends with the phenotype is known as reverse-genetics. On the other hand, gene sequencing can be defined as the methodologies/techniques/tools used to determine the nucleotide base pair sequence of a particular gene. The gene knockout technique involves knowing a priori the gene sequence in order to obtain a gene knockout (gene KO). The combination of the information obtained from these techniques can be used to determine how variation (genetic variation) affects the expression of a phenotypic trait.
4. Take a beaker (jar or jug) with some water and put some drops of red or blue
ink in it. Take a tender twig of any flowery plant with leaves and flowers, preferably
white flowers, and put it in the beaker for 6 to 8 hours. What do you observe? For
further examination cut across its stem and look for the presence of colored water.
Explain your observations.
Answer:
Blue Ink patches are observed on the leaves of the plant. Also, on cutting across the stem of the plant, the red color of the solution is found along the length of the stem.
The above observation shows that the stem of the plant conducts water through its length to the leaves of the plant.
Explanation:
The leaves of plant obtain water and minerals from the soil through the roots of the plant. The water is conducted by the stem of the plant from the roots to the leaves of the plant where they are needed for photosynthesis as well as for cooling the plant. The xylem tissue in plants is responsible for conducting water to the leaves of the plant from the roots of the plant through the stem.
The conduction of water from the roots to the leaves of the plant is maintained by capillary action as well as by transpiration pull. Transpiration pull refers to the pull of water by the transpiration action taking place in the leaves of the pant, whereby water evaporates from the leaves of the plant through the opening in the leaf of the plant.
When the blue ink is added to the water, the colored water is conducted through the stem of the plant to the leaves. On getting to the leaves, the water molecules evaporate leaving behind the colored patches fond on the leaves. When the stem of the plant is cut, the blue color is seen along its length showing that the colored water was conducted through it.
Plasma membranes allow certain materials to pass through them. Investigate how this property contributes to homeostasis.
Answer:
this
The Plasma membrane maintains the homeostasis throughout a cell because it filters what substances go in and out of the cell. If there is too much of a substance in a cell the plasma membrane quickly disposes it and when there is not enough of a substance in a cell the plasma membrane lets the substance in.
or this
A major role of the plasma membrane is transporting substances into and out of the cell. The plasma membrane is selectively permeable, allowing only certain substances to pass through. ... Cell transport helps cells maintain homeostasis by keeping conditions within normal ranges inside all of an organism's cells.
one of them should have been the answer ;)
Why is it important for DNA to remain in the nucleus?
Which type of star cluster forms from tightly packed groups of older stars?
Answer:
Which type of star cluster forms from tightly packed groups of older stars?
binary
eclipse
globularopen
Its c
Explanation:
I did the quizz
1
Which is NOT true of homologous chromosomes? *
(1 Point)
they are identical
they have genes for the same traits
they are in pairs
they have genes that are in the same order
Answer:
Homologous chromosomes are NOT identical.
Explanation:
They contain slight differences in their genetic information, allowing each gamete to have a unique genetic makeup. Consider that the homologous chromosomes of a sexually reproducing organism are originally inherited as two separate sets, one from each parent. Hope this helps :)
Imagine you could shrink to the scale of the tiny particles that make up matter and move around in a cup of hot chocolate. Write about or draw (and then upload) what you would experience.
Answer:
can you make my friend............
A plant can have green (G) or yellow (g) leaves. It can also have a long (K) or
short (k) stem. A scientist is preparing a Punnett square for a dihybrid cross
of a plant with a genotype GGKK. What possible gametes can the plant
produce?
O A. GG, Kk
O B. GK gk
OC. GK, Gk
OD. GK, Gk, gk gk
Which would be the best approach for a student to use in determining
whether an unidentified block is made of metal?
A checking its color
B. determining its mass
C. determining its weight
D. checking its conductivity
Identify the independent, dependent, and constant variables for different experiments. A biologist tests different lighting conditions for bacteria. She uses the same number of the same strain of bacteria on each petri dish, with the same type and amount of growing medium on each. Each petri dish is subjected to a different amount of light for a 24-hour period. After this time, the biologist counts the number of bacteria on each petri dish.
Answer:
points
Explanation:
A homogeneous mixture is known as a(n) A dicolloidal B solution C solvent D suspension
Answer:
A homogeneous mixture is known as B. Solution.
Darwin’s explanation for evolution was dependent on which scientific concept?
Answer:
The existence of variations in population.
PLEASE HELP. Which organelle is a place for storage of materials within the cell? *
Vacuoles
Nucleus
Mitochondria
Ribosomes
Answer:
vacuole
Explanation:
the nucleus is the control center
the mitochondria is the power house
ribosomes deal with proteins
hope it helps:)
A student is investigating how substrate concentration affects the rate of anenzyme-catalyzed reaction. Which threevariables should be kept constant in the setup of thestudent’s investigation? Select all three variablesA. temperature of the reactionB. amount of enzymeC. amount of substrateD. amount of productE. pH of the reaction
Answer:
A. temperature of the reaction
B. amount of enzyme
E. pH of the reaction
Explanation:
Temperature should be kept constant because enzymes operate at different activity rates depending on the temperature. The same goes for the pH as well with different enzymes having different optimal pH levels.
The amount of enzyme should be kept constant as well because different concentrations of enzymes can determine how fast the reaction will occur.
Essentially anything that could affect enzyme activity apart from substrate concentration should be kept constant.
How can structural changes to DNA effect the structure and function of an organism?
The structural changes to DNA affect the structure and function of an organism, such as in a mutation. When the mutation occurs, the DNA structure changes, which in turn affects gene function.
What effect does mutation have on an organism?When a mutation occurs in the gene segment, then the structure and function of the gene are affected, especially when the exon portion of the gene is affected, and the mutation can be caused either by radiation or any other chemical factors and can cause many types of mutation, such as the nucleotide mutation, base mutation, etc. Apart from that, gene function is also affected when the gene is present in the heterochromatin region.
Hence, structural changes to DNA affect the structure and function of an organism, such as in a mutation. When the mutation occurs, the DNA structure changes, which in turn affects gene function.
Learn more about the mutations in organisms here.
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Which optical phenomena are formed by ice crystals?
explain which direction the molecules will move during diffusion?
Answer:
Up and down
Explanation:
In the process of diffusion, a substance tends to move from an area of high concentration to an area of low concentration until its concentration becomes equal throughout a space.
Answer:
Molecules will move from an area of high concentration to an area with lower concentration.
When amino acids are linked together to form chains the molecule formed is called what?
Answer:
Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.
Explanation:
How do the daughter cells compare genetically to the original parent cell after mitosis?
Answer:
after mitosis there are two daughter cells, which are genetically identical to the parent cells.
Explanation:
The daughter cells are identical to the parent cells because the cell copies/ replicates its chromosomes. Then it splits the chromosomes equally so that each daughter cell has a complete set of chromosomes.
Parent cell give rise to daughter cell being genetically identical because of it replicates the DNA, so after mitosis, both daughter cell is genetically identical to the parent cell.
How daughter cell is genetically identical to the parent cell?Mitosis results in the formation of two identical daughter cells, each with the same number of chromosomes as the parent cell.
Meiosis, on the other hand, produces four distinct daughter cells, each with half the amount of chromosomes as the parent cell. Because DNA replicates to complementary to other DNA strands.
The mature cell that is undergoing cell division is known as the parent cell or the mother cell, and the new cells that emerge at the conclusion of the cell division are known as daughter cells.
Therefore due to DNA replication daughter cell is genetically identical to the parent cell after mitosis.
Learn more about daughter cell is genetically identical to the parent cell, here:
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Is this correct? Also ill mark Brainliest.
What are the roles of consumers? Select two options.
1. to create usable food energy
2. to balance the number of producers in an ecosystem
3. to break down dead organisms
4. to eat other organisms
5. to provide energy for producers
The answers are 2 and 4 because consumers kill to eat which balances the number of producers and they eat other organisms
Which of the following statements is true?
a) only males can get an X-linked. disorder.
b) only females can get an X-linked disorder.
c) only males can get a Y-linked disorder.
Answer:
The answer is a
Explanation:
X-linked disorders result from mutated genes on the X chromosome. Males, who have only one X chromosome (i.e., they are hemizygous), will fully express an X-linked disorder. On the other hand, females, who have two X chromosomes, will be carriers of the defect in the majority of cases, and so they are usually asymptomatic.
The normal pulse rate is ___________. *
1. 70 to 90 per minute
2. 70 to 80 per minute
3. 40 to 70 per minute
4. 70 to 100 per minute
Class 7
C. 70 to 100 per minute
Which ends up with half the number of chromosomes?
Answer:
Meiosis end ups with half the no. of chromosomes..
Answer:
Meosis
Explanation:
Meosis 1 ends with 2 diploid cells that end up dividing again into 4 haploid cells. Thus, the end result of meosis is 4 haploid cells with 23 chromosomes each.
What are two examples of how the urinary system maintains homeostasis in the human body?
Answer:
In addition to maintaining fluid homeostasis in the body, the urinary system controls red blood cell production by secreting the hormone erythropoietin. The urinary system also plays a role in maintaining normal blood pressure by secreting the enzyme renin.
Explanation:
Air pollution is a major health problem caused by the burning of fuels in
a.vehicles.
b.power plants and factories.
c.home furnaces.
d.All of the above
Answer:
D
Explanation:
all of those contribute to air pollution
Answer: D
Explanation:
What do we call the freeze dried state that Monerans enter to survive harsh conditions ?
HELPPPPPPP
Answer:
dddďdddddddddddddddddddddd
Answeer: cell state
Explanation:
What happens when cerebrum of brain get injured?
An amoeba ingests large food particles by
What is the difference between the cell membrane and the cell wall?
Answer:
Cell membrane helps to enclose the cell organelles and cytosol inside a cell. ... A cell wall is a ridgid, protective layer and it covers the cell membrane. For plants, cell walls are mainly made up of cellulose, while a cell wall in bacteria is made up of peptidoglycan,and for fungi it is made up of chitin.
Explanation: