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

a. heterozygous

b. homozygous or heterozygous

c. homozygous

d. diploid

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

In a mating between two individuals that are heterozygous for a recessive lethal allele that is expressed in utero, what genotypic ratio (homozygous dominant:heterozygous: homozygous recessive) would you expect to observe in the offspring?

a. 1:2:1

b. 3:1:1

c. 1:2:0

d. 0:2:1

How would you perform a reciprocal cross for the characteristic of stem height in the garden pea?

Figure 12.5In pea plants, round peas ( R ) are dominant to wrinkled peas ( r ). You do a test cross between a pea plant with wrinkled peas (genotype rr ) and a plant of unknown genotype that has round peas. You end up with three plants, all of which have round peas. From this data, can you tell if the round pea parent plant is homozygous dominant or heterozygous? If the round pea parent plant is heterozygous, what is the probability that a random sample of 3 progeny peas will all be round?
See all solutions

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