CHALLENGE QUESTIONS Sex Linkage: Red-green colorblindness is a sex-linked, reces
ID: 202730 • Letter: C
Question
CHALLENGE QUESTIONS Sex Linkage: Red-green colorblindness is a sex-linked, recessive trait. Cliff and Clair Huxtable both have normal color vision. Clair's father, however, was red-green color-blind. 4. a. b. c. d. What is the Cliff's genotype? What is the Clair's genotype? What is the probability that their daughters will be color blind? What is the probability that their sons will be color blind? Incomplete Dominance: Hair curl is a trait that shows incomplete dominance (see table 10.2 above). Mr. and Mrs. Cunningham (Howard and Marion) both have wavy hair 5. a. . What is Howard's genotype? b. What is Marion's genotype? c. Determine the predicted genotype and phenotype frequencies of their offspring.Explanation / Answer
XcY x XX
a) Thus, the genotype of Cliff is XcX.
b) genotype of Clair is XY
XcX x XY
Thus,
c) probability that their daughters will be colorblind is zero because 50% daughters will be normal and 50% daughters are carrier for red green colour blindness.
d) probability that their son will be color blind is 50%.
Xc Y X XcX XY X XcX XY