Sex-linked traits

Which of the following genotypes shows a CARRIER for a trait?

• X^BX^b

• X^bX^b

• X^BX^B

• X^bY

Tags

NGSS.HS-LS3-1

Colorblindness is a recessive X-linked disorder.

Which genotype represents a male with normal vision?

• X^N Y^N

• Xⁿ Yⁿ

• X^N Y

• Xⁿ Y

Tags

NGSS.HS-LS3-1

Which of the following genotypes belongs in the red box in the Punnett square?

• X^BX^b
• X^bX^b
• X^bY
• X^BY

Tags

NGSS.HS-LS3-2

What would the genotype be of a colorblind male?

• X^NY

• X^NYⁿ

• XⁿY

• XⁿYⁿ

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The woman who is colorblind marries a man with normal vision. What is the probability that their sons will be colorblind?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which best explains why males cannot be carriers of X-linked traits?

• Males only have one X chromosome

• Males have two copies of the X chromosome

• Males can be heterozygous for a particular trait

• Males do not have an X chromosome

A woman who is a carrier for the sex-linked trait hemophilia has children with a man with hemophilia. What percentage of offspring would be expected to have hemophilia?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R X ^r ?

• male with white eyes

• female with red eyes

• male with red eyes

• female with white eyes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R Y ?

• male with white eyes

• female with white eyes

• male with red eyes

• female with red eyes

Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?

• X^HX^h
• X^hX^h
• X^HX^H
• X^hY

Tags

NGSS.HS-LS3-1