I do not have the time to post each individually but i will give credit/response

Question

I do not have the time to post each individually but i will give credit/response to each question answered individually!!

A. How do the experiments of modern plant breeders differ from the methods used by Gregor Mendel?

B. How was Mendel able to isolate a particular trait for study? How did he control for outside factors that might confound his results?

C. What is the reproductive mechanism that allows for an offspring to inherit a trait that is expressed in neither parent?

D. How does a Punnett square work?

E. What is the theory of independent assortment?

F. What are some of the phenotypic variations that are possible with codominance? With incomplete dominance?

G. What is epistasis, and how does it influence the inheritance of a particular trait?

H. What is hemophilia? What kind of inherited defect produces the disorder?

I. What are some of the signs and symptoms of hemophilia?

J. How does the process of inheritance in humans differ from that of plants?

Explanation / Answer

For part F, you have to understand that codominance is a situation in which the phenotypes of both alleles are exhibit in the heterozygote. Usually you have 2 alleles that will produce 3 phenotypes depending on how the alleles are arranged. For instance, think of the MN blood group in humans. A person homozygous for one type of the molecule (MM or NN) will only have that particular molecule on the surface of red blood cells (either M or N). However, a person who is heterozygous (MN) will have both M and N molecules on the surface of their cell surfaces. For incomplete dominance, it is the situation in which the phenotype of heterozygotes is intermediate between the phenotypes of individuals homozygous for either allele. Usually you will have 2 alleles that produce 3 phenotypes depending on how the alleles are arranged. Let's take an example: the color of roses. Let's say that roses homozygous for red pigments (RR) will be red and roses homozygous for white pigments (WW) will be white. So what happens to the rose that is heterozygous (RW)? The color for this rose would be pink. PLEASE RATE LIFESAVER if you can understand this. THANKS.

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