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Chapter 12: Q. 31 (page 328)

Explain epistasis in terms of its Greek-language roots 鈥渟tanding upon.鈥�

Short Answer

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The interplay of genes which affects a phenotype is referred as epistasis.

Step by step solution

01

Step. 1 Introduction 

The expression with one gene is altered by that of the expression with one maybe more separately genetic inheritance, which is termed as epistasis.

02

Step. 2 Explanation 

An antagonistic association amongst genomes occurs when one gene conceals or hinders with that of the activity of the other. This interference gene is often referred as epistatic, as if it were "standing upon" another (hypostatic) gene to inhibit its expression.

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Most popular questions from this chapter

Labrador retrievers鈥� fur color is controlled by two alleles, E and B. Any dog with the ee__ genotype develops into a yellow lab, while B_E_ dogs become black labs and bbE_ dogs become chocolate labs. This is an example of _____.

a. epistasis

b. codominance

c. incomplete dominance

d. linkage

A recessive trait will be observed in individuals that are ________ for that trait.

a. heterozygous

b. homozygous or heterozygous

c. homozygous

d. diploid

Mendel performed hybridizations by transferring pollen from the _______ of the male plant to the female ova.

a. anther

b. pistil

c. stigma

d. seed

The ABO blood groups in humans are expressed as the IA, IB, and i alleles. The IA allele encodes the A blood group antigen, IB encodes B, and i encodes O. Both A and B are dominant to O. If a heterozygous blood type A parent (IAi) and a heterozygous blood type B parent (IBi) mate, one-quarter of their offspring will have AB blood type (IAIB) in which both antigens are expressed equally. Therefore, ABO blood groups are an example of:

  1. multiple alleles and incomplete dominance

  2. codominance and incomplete dominance

  3. incomplete dominance only

  4. multiple alleles and codominance

Describe one of the reasons why the garden pea was an excellent choice of model system for studying inheritance.
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