Part 4: sex-linked inheritance—predicting color blindness in offspring recall that females have two x chromosomes: one from the mother and one from the father. males have one x chromosome and one y chromosome; the x chromosome comes from the mother, and the y chromosome comes from the father. traits associated with genes located on the sex chromosomes are called sex-linked traits. individuals with the sex-linked condition called red-green color blindness do not perceive the colors red and green. red-green color blindness is caused by the recessive allele b and is carried on the x chromosome. the dominant allele for normal color vision is b. when an x chromosome contains the dominant allele, the allele is written as . when an x chromosome contains the recessive allele, the allele is written as . (score for question 1: of 1 points) 1. what is the genotype of a male with red-green color blindness?type your answer here. (score for question 2: of 1 points) 2. what is the genotype of a female who is not color-blind but is a carrier of red-green color blindness?type your answer here. (score for question 3: of 2 points) 3. even though red-green color blindness is a recessive trait, can a female have red-green color blindness? explain. type your answer here. (score for question 4: of 2 points) 4. a man who is color-blind marries a woman who is not color-blind and is not a carrier of the allele for color blindness. create a punnett square to predict the possible genotypes of their children. type your answer here. part 4 punnett square (score for question 5: of 1 points) 5. will all of the female children be carriers of the color-blind allele, or will none be carriers?type your answer here. (score for question 6: of 1 points) 6. will all of the male children be color-blind, or will none be color-blind? explain. type your answer here.

1) recessive allele is b
    dominant allele is B
When an X chromosome contains the dominant allele,is written as:

2) When an X chromosome contains the recessive allele, is written as:

3)
question 1)  The genotype of a male with red-green color blindness is
Since its a male, he has a Y chromosome and one X chromosome. If the only X he has has the recessive allele, he will express the red green color blindness. The Y doesn't have any allele associated to this colorblindness.

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question 2) the genotype of a female who is not color-blind but is a carrier of red-green color blindness:
Since its a female, she has two X chromosomes.  If she is not colorblind is because there is the dominant allele making her see normally. But, she is a carrier, so while one X chromosomes has the dominant allele, the other has the recessive (making her carry the disease). 

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question 3) Yes, even though red-green color blindness is a recessive trait,  a female can still have red-green color blindness.
Since its a female, she has two X chromosomes.  For a woman to be red-green colorblind, she needs to inherit both X chromosomes with the recessive trait from the mother and the father.
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question 4)
A man who is color-blind has the genotype. He marries a woman who is not color-blind and is not a carrier of the allele, so none of her alleles is recessive. Her genotype is:
Their offspring, if they are girls, they will be carriers, because they receive a normal allele from the mother but a allele with the disease from the father(
) . If they are boys, they will receive a Y from the father and a normal allele from the mother, so none will suffer from colorblindness ()
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question 5)
all of the female children will be carriers of the color-blind allele because they receive a normal allele from the mother but a allele with the disease from the father. They will have this genotype:
 8)
question 6)
None of the male children will be color-blind  because they will receive a Y chromosome from the father and a chromosome with the normal allele from the mother, so none will suffer from red-green color blindness. Their genotypes: