Sex-linked Inheritance Quiz 90%

Duchenne muscular dystrophy is an X-linked recessive disorder.What is the probability that a female offspring of the cross that is shown above would have a recessive allele for Duchenne muscular dystrophy disorder?

100 percent

Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows a cross in which the probability of offspring will have red eyes is 100 percent?

A

Which pedigree symbol is used to represent a female carrier of a recessive X-linked trait?

B

Which statement about inheritance is true?

Fathers always determine the gender of the offspring in humans.

What is genotype for a recessive trait found on the female chromosome?

NOT XH

Which allele combination represents a female who is a carrier for an X-linked recessive disorder?

XRXr

Which allele combination represents a female who is heterozygous for a sex-linked trait?

XRXr

Which combination of alleles are always involved in the inheritance of a sex-linked trait?

alleles that are carried on X and Y chromosomes

Which is not considered a sex-linked trait?

purple flower color in pea plants

What is the purpose of using a pedigree?

to understand patterns of inheritance in organisms