1. Hair texture in humans is inherited through incomplete dominance, providing t
ID: 100073 • Letter: 1
Question
1. Hair texture in humans is inherited through incomplete dominance, providing the option for three hair textures: straight, curly, or wavy. If an individual with wavy hair marries an individual with straight hair, what phenotypic ratio would you predict for their offspring?
75% straight; 25% wavy
25% curly: 25% wavy: 25% straight
25% straight: 50% wavy: 25% curly
50% wavy: 50% straight
25% straight: 50% curly: 25% wavy
2. If your mother is homozygous normal, but your father has Huntington's disease (inherited through a dominant allele), what is the probability you will escape the disease entirely (be homozygous normal)?
25%
50%
75%
both a and b are possible genotypes for the husband
both a and c are possible genotypes for the husband
3. In a normal human being, there are:
46 chromosomes
23 pairs of chromosomes
one pair of sex chromosomes
all of the choices (a-c) are correct
both a and c are correct, but b is incorrect
4. If a person inherits two X chromosomes, that person will be:
a female
color blind
a male
sterile
none of the choices (A-d) are correct
a.75% straight; 25% wavy
b.25% curly: 25% wavy: 25% straight
c.25% straight: 50% wavy: 25% curly
d.50% wavy: 50% straight
e.25% straight: 50% curly: 25% wavy
Explanation / Answer
1) Well the answer d will be correct because allelws for wavy (Hh) hair are dominant over straight hair (hh). As this is the example of incomplete dominance. Therefore 50% of the offsprings have atraight hair and 50% will have wavy hair.
2) if the mother had hutington's disease then thre are 50% chances for the offspring to escape the disease if the mather is heterozygous and if rye mother is homozygous than there are only 25% chances of escape.
3) all choics are correct (a to c).
4) if a person inherits two chromosomes than it will be a female (XX)
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