X-linked traits

The biological sex of a child is determined by

• whether the father passes down an x or y chromosome

• whether the mother passes down an x or y chromosome

• the age of the parents

Tags

NGSS.HS-LS3-1

An individual's biological sex is determined by

• 1 of 23 chromosomes

• 2 of 46 chromosomes

• 4 of 92 chromosomes

Males are more likely to suffer from a sex-linked disease or disorder because

• males have 2 X chromosomes, so they are twice as likely to receive the disease

• males have less DNA

• males have 1 X chromosome, so the disorder is more likely to be expressed

• Males have a Y chromosome to cancel out the genes on the X chromosome

If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 

• sex-linked trait
• polygenic trait
• codominant trait
• incomplete dominance trait

Tags

NGSS.HS-LS3-1

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

Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?

• X^HX^h
• X^hX^h
• X^HY
• X^hY

Tags

NGSS.HS-LS3-1

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

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

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the genotype of a white eyed male fly?

• X ^R X ^r

• X ^R X ^R

• X^r X ^r

• X ^r Y

• X^R Y

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Colorblindness is a sex-linked recessive trait. A colorblind woman marries a male with normal color vision. What is the percent chance of them having a color blind son?

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2