Lesson 5: Sex-linked Inheritance

Question 1

Humans have ⇒ 23 chromosome pairs.

Revolt · Accepted Answer

answer

Question 2

have two X chromosomes, while have one X chromosome and one Y chromosome.

Revolt · Accepted Answer

Females; Males; females; males

Question 3

Which statement about sex-linked traits is true?

Revolt · Accepted Answer

Sex-linked traits may be passed from parent to offspring on either the X chromosome or the Y chromosome.

Question 4

Which statement about Thomas Hunt Morgan’s conclusion is true?

Revolt · Accepted Answer

Traits like white eye color in fruit flies are linked to the X chromosome.

Question 5

Look at the Punnett square for an X-linked recessive disease. Is it possible for a female offspring to have the disease?

Revolt · Accepted Answer

no

Question 6

Use the pedigree on the right to determine which of the following are possible genotypes for Irene.

Revolt · Accepted Answer

XHXh; XHXH

Question 7

What chance does Irene have of being a carrier? Express your answer in a percentage. ⇒ 50%

Revolt · Accepted Answer

answer

Question 8

Use the pedigree on the right to determine the genotype of Ryan.

Revolt · Accepted Answer

XRY

Lesson 5: Sex-linked Inheritance Answers