Question

Question 1(Multiple Choice Worth 2 points)

A man and woman have a son who is color blind, a recessive sex-linked trait carried on the X chromosome, but neither parent is color blind. The woman is now pregnant with their second child. Which of the following statements is true about the second child?

A daughter will be color blind because the father is a carrier of the recessive allele.
A son will be color blind because the mother is a carrier of the recessive allele.
A daughter will not be color blind because the father is not a carrier of the recessive allele.
A son will be color blind because the father’s mother must have been a carrier for recessive allele.
Question 2(Multiple Choice Worth 2 points)

In some bees, thin stripes (S) are dominant over thick stripes (s) and black eyes (B) are dominant over gray eyes (b). Complete a dihybrid cross for parents with the genotypes SsBB and ssBb and determine the likelihood of offspring with the genotype ssBB.

SB SB sB sB
sB SsBB SsBB ssBB ssBB
sb SsBb SsBb ssBb ssBb
sB SsBB SsBB ssBB ssBB
sb SsBb SsBb ssBb ssBb
1/16
4/16
3/16
2/16
Question 3(Multiple Choice Worth 2 points)

In a monohybrid cross, if the gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing two intermediate (Tt) parent plants? (Hint: You may want to complete a Punnett square.)

25 percent tall, 50 percent intermediate, 25 percent short
50 percent tall, 25 percent intermediate, 25 percent short
100 percent intermediate
25 percent tall, 75 percent intermediate
Question 4(Multiple Choice Worth 2 points)

This pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. Based on the information in the chart, which of the following statements is true about individuals 3 and 4?

This pedigree chart shows three generations. The individuals are numbered from left to right, starting at the top left of the chart. Squares represent males and circles represent females. If the symbol is gray, that individual exhibits the recessive trait. If the symbol is white, the individual exhibits the dominant trait. On the first row there are two couples mated together. The first couple is made up of individuals #1 (recessive) and #2 (dominant). They have four offspring on the second row that all exhibit dominant traits: #5 (dominant), #6 (dominant), #7 (dominant), and #8 (dominant). The second couple in Generation #1 is made up of individual

Answer 1

Separate the questions next time D:

It's much easier to see when separate

However note that they said that the son had the recessive trait based on their gender

This means if girl were to be born, then she would not carry the color blindness because the father is normal

In order to get a recessive trait, you would need both parents to have the trait {or in a rare case, otherwise but unlikely}

Answer 2

Im gonna make close this and make a new one...that has seperate questions