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Chapter 12: Q. 28 (page 328)

Can a human male be a carrier of red-green color blindness?

Short Answer

Expert verified

Males are just not primarily characterized as carriers of red-green vision problems.

Step by step solution

01

Step. 1 Introduction

The most prevalent kind of color deficiency is red-green colour impairment. One may very well have trouble recognizing various shades of red, green, and yellow if you do have this form of color vision. Deuteranopia is also a term for this.

02

Step. 2 Explanation

No, males cannot be the carriers of red-green color blindness, as color blindness is X-linked. Only females with two Xc genes become colorblind in both directions. Only the combination of color-blind males and a color-blind or carrier woman may result in this case. Because males lack a second X chromosome that may conceal the characteristic, all males having an Xc gene shall become colorblind in both red and green.

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Most popular questions from this chapter

A heterozygous pea plant produces violet flowers and yellow, round seeds. Describe the expected genotypes of the gametes produced by Mendelian inheritance. If all three genes are found on the same arm of one chromosome should a scientist predict that inheritance patterns will follow Mendelian genetics?

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

a. heterozygous

b. homozygous or heterozygous

c. homozygous

d. diploid

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

a. multiple alleles and incomplete dominance

b. codominance and incomplete dominance

c. incomplete dominance only

d. multiple alleles and codominance

How many different offspring genotypes are expected in a trihybrid cross between parents heterozygous for all three traits when the traits behave in a dominant and recessive pattern? How many phenotypes? a. 64 genotypes; 16 phenotypes b. 16 genotypes; 64 phenotypes c. 8 genotypes; 27 phenotypes d. 27 genotypes; 8 phenotypes

The observable traits expressed by an organism are described as its ________. a. phenotype b. genotype c. alleles d. zygote
See all solutions

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