3. In 1981, a stray black cat with unusual curled-back ears was adopted by a family in California. Suppose you were the person who owned the first "curl" cat, and wanted to develop it into its own breed. How would you determine whether the allele for curled ears is dominant or recessive? Why does it make a difference for breeders whether an allele for a trait is dominant or recessive?
It is possible to determine whether the allele for curled ears is dominant or recessive by performing a test cross. It is fundamental for breeders because desired traits show differential patterns of inheritance.
In a diploid (2n) organism, a given gene locus exhibit two different variants or forms called 'alleles'.
An individual is homo-zygous when both alleles for a given gene locus are the same, while an individual is heterozygous when alleles are different.
In cases of complete dominance, the expression of the recessive allele is completely masked in heterozygous individuals.
A breeder is a professional who performs genetic crosses between different organisms in order to obtain offspring (eg., plants, animals, etc) with desired phenotypic features.
A test cross is a type of cross that breeders use to determine whether an allele is dominant or recessive (in this case, the allele for curled ears).
In a test cross, the organism that is a carrier of the unidentified allele is crossed with another organism that is believed to be homo-zygous for the recessive trait, and then the proportion of offspring is examined.
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describe the mechanism of blood sugar regulation (20 marks)
Insulin helps the cells absorb glucose, reducing blood sugar and providing the cells with glucose for energy. When blood sugar levels are too low, the pancreas releases glucagon. Glucagon instructs the liver to release stored glucose, which causes blood sugar to rise.
The pancreas releases glucagon when glucose levels fall too low. Glucagon causes the liver to convert stored glycogen into glucose, which is released into the bloodstream. High BG levels stimulate the release of insulin. Insulin allows glucose to be taken up and used by insulin-dependent tissues, such as muscle cells.p
Answer:
Insulin helps the cells absorb glucose, reducing blood sugar and providing the cells with glucose for energy. When blood sugar levels are too low, the pancreas releases glucagon. Glucagon instructs the liver to release stored glucose, which causes blood sugar to rise.
The pancreas releases glucagon when glucose levels fall too low. Glucagon causes the liver to convert stored glycogen into glucose, which is released into the bloodstream. High BG levels stimulate the release of insulin. Insulin allows glucose to be taken up and used by insulin-dependent tissues, such as muscle cells.
why do the scientists feel comfortable with calling the hybrids a new species
Answer:
1 . They have the potential to interbreed in nature . 2 . They can produce viable offspring if they do interbreed—that is, their offspring are healthy enough to produce offspring of their own . and also its new,
Explanation:
list the levels of organization of that make up an organism, starting with an atom and ending with an organism
Answer:
The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.
Why are some atmospheric components like Corbin dioxide methane called greenhouse gasses
what determines which individuals will survive and which will not? help me please I hate biology so much
Explanation:
pretty sure the answer is, "adaptation."
only the creatures that can adapt 2 changing environments are the ones who survive...
Guys should I cut my hair
Explanation:
why ?????
Answer:
for me I will say no because you will not be as fine as now and why do you want to cut your hair
What does the receptor protein do?
stops things from entering into cell
helps cell self destruct when necessary
Receives chemical signals from the brain.
helps the flow of blood
Answer:
the answer is Receives chemical signals from the brain.
Explanation:
i took the quiz have a good day
Explain five possible setbacks a company could face if they don't develop effective configuration management policies and processes.
Possible setbacks are the difficulty in keeping up with market changes, failures in product production, failures in product distribution, sector problems, problems in the management of employees.
We can arrive at this answer because:
The management of a company is essential for its proper functioning and the success of the production.One of the first problems that lack of management causes is the difficulty in keeping up with market changes. This makes the company outdated and inefficient.Talking about the production and distribution of the product harms sales and reduces the number of customers.Sectoral problems hinder organized production, which will also affect sales.Problems in managing employees will also be disadvantageous, as it will affect all of the company's compositional factors.Therefore, we can say that management is the most important point to be organized.
More information about management at the link:
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PLEASE HELP WITH THIS ONE QUESTION
Which statement about oogenesis is correct?
A) Diploid secondary oocytes undergo meiosis II to form a haploid ootid cell and a polar body.
B) Haploid secondary oocytes undergo meiosis II to form a diploid ootid cell.
C) Two diploid secondary oocytes undergo meiosis II to form four haploid ootid cells.
D) Haploid secondary oocytes undergo meiosis I to form a haploid ootid cell and a polar body.
Answer:
A is correct.
Explanation: At the end of meiosis II there are 3 polar bodies and one octet that are all haploid.
organisms can be made up of many________
Answer:
individual organisms can be organized into the following levels: cells, tissues, organs, and organs systems.
Which component of blood contains
no nucleus or organelles and carries
oxygen to body tissues?
Answer:
Red Blood Cells
Explanation:
They mainly contain hemoglobin, and no nucleus or organelles, it also carries oxygen to body tissues.
I hope you found this useful, please mark as brainliest
A DNA molecule is shaped like a _____.
A. Straight Ladder
B. Triple Helix
C. Long thin rod
D. Spiral Staircase
Answer: D. Spiral staircase
Explanation: Hope that helped you a ton.
Endergonic (energy absorbing) reactions
a. Have more energy in the reactants than in the products
b. Have more energy in the products than in the reactants
c. Are illustrated by the breakdown of glucose (cellular respiration)
d. Can release heat as waste energy
SCIENCE
Which seafloor feature is an example of an abyssal plain?
Answer:
mid-ocean ridge
Ocean trenches
After scaling the mid-ocean ridge and traversing hundreds to thousands of miles of abyssal plains, you might encounter an ocean trench. The Mariana Trench, for example, is the deepest place in the ocean at 36,201 feet
Explanation:
please mark me brainliest and i think it is c
Organisms that reproduce sexually are different from organisms that
reproduce asexually in that sexually reproducing organisms have
A. a larger number of offspring
G. offspring that are nearly identical to their parent
V. more genetic variation among their offspring
E. offspring that are perfectly adapted to their parents' habitat
Answer:
I think it's V!
Explanation:
It's because they have 2 sets of genetic variations which are delivered from the (pollen in plants and sperm in animals)-while the other one is an egg which is a gamete...
"Sexually reproducing organisms make sex cells or gametes."
Plants break down the food, prepared during photosynthesis, with the help of _____. (a) Oxygen (b) Carbon dioxide (c) Hydrogen (d) Nitrogen
Answer: (a) Oxygen
Explanation: Oxygen reacts with the plants food releasing energy.
please help me match these up click the photo to see it better
Which kingdom consists of only heterotrophic organisms? A. Bacteria B. Protista C. Fungi D. Plantae
Answer:
FUNGI
Explanation:
I did the quiz
Gaseous exchange is best described as?
Answer:
The exchange of oxygen and carbon dioxide between the alveoli and bloodstream (via passive diffusion)
Explanation:
;)
Answer: The exchange of oxygen and carbon dioxide between the alveoli and bloodstream
Explanation:
I hope this helps
Which weevil is closely related to the oak weevil
Which of the following is a problem that could result from poor monitoring of free range grazing?
The increased use of antibiotics
The additional exposure of soil layers
The prevention of invasive plant species
The higher rates of mental illnesses in animals
Answer:
The additional exposure of soil layers.
Explanation:
Antibiotics are administered by humans, so less contact with humans won't cause an increased use of antibiotics. The prevention of invasive plant species is not a problem, nor would it be caused by improper management of free range animals. Mental Illness in animals is usually caused by being put in small enclosure or living in poor conditions, not by being allowed free range. Therefore, the answer is the additional exposure of soil layers, since excessive grazing can decimate plant and soil layers.
I hope that helped!
Answer:
The additional exposure of soil layers
Explanation:
I took the test and I got it right
Which of the following organism would you consider to be unicellular and multicellular
1) Bacteria cell
2) Bat
3) Tree
4) Frog
5)Chicken Egg
6) Baker's yeast
PHOTOSYNTHESIS, PLEASE HELP!!! asap
100 POINTS!!
Answer:
you may need to fact check me
Explanation:
For more info you can check out the calvin cycle and Photosystem I & II Khan academy has great videos on this
The ___ separates the heart into two parts. HELPP
Answer:
The septum
Explanation:
The septum is a thick wall of muscle that divides the heart. It separates the left and right sides of the heart.
PLEASE HELP WITH THIS ONE QUESTION
What statement about the inheritance of mitochondrial DNA is true?
A) The sperm cell donates most of the material in the cytoplasm to the zygote, including mitochondrial DNA.
B) The egg and sperm cells contribute equal amounts of mitochondrial DNA to the zygote.
C) The egg cell donates most of the material in the cytoplasm to the zygote, including mitochondrial DNA.
D) The sperm cell donates most of the DNA in the nucleus to the zygote, including mitochondrial DNA.
Answer:
The answer should be C
Explanation:
The egg contributes all the cytoplasm and organelles to the zygote. The sperm only contributes one set of chromosomes.
The typical sperm midpiece contains approximately 50-75 mitochondria with one copy of mtDNA in each. This represents an 8- to 10-fold decline in copy number during spermiogenesis.
Cancer is subject to evolution due to: Question 25 options: A) Gene flow B) Tumor cells experiencing a bottleneck event due to chemotherapy C) Natural selection and competition between cells of two different tumors D) Natural selection and competition between cells of the same tumor
16. Use the graph to answer the questions.
a. What is the slope of the line?
b. What does it mean in the context of this graph?
Answer:
a) 1/2
b) It is gradually rising
Explanation:
a) To find the slope you do rise/run from the points given and in this case you go up one and over 2, therefore 1/2
you don need to actually chew the bread. you can just break it up into smaller pieces. which variable will you change in your investigation?
Answer: The type of bread (independent variable)
Explanation:
You can just change the type of bread you are eating and just hold it in your mouth to test your hypothesis of not having to chew the bread. It’s the easier thing to change when making the experiment. Now your bread is your independent variable because you are not changing anything else but the type of bread. Not sure if your question is talking about the technical terms for the variable or what actual variable in the experiment, so I put down both.
What does it mean for the brain to process information contralaterally? What about ipsilaterally? How does the corpus callosum play a role in these
processes (both contralateral and ipsilateral)? What happens when someone has a split-brain procedure?
Answer:
the answer is c I promise
Explanation:
I just took the test