Sex-linked Traits and Pedigrees

Which of the following is NOT a sex-linked trait?

• Color-blindness
• Muscular Dystrophy
• Huntington disease
• Hemophilia

How many PAIRS of sex chromosomes do humans have?

• 23
• 46
• 1
• 2

I have 2 X chromosomes. What am I?

• Male
• Female

I have 1 X chromosome and 1 Y chromosome. What am I?

• Male
• Female

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

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

What percentage of the offspring will have this recessive disease?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What percentage of the female offspring will be a carrier for this recessive disease?

• 0%
• 50%
• 100%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

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

Colorblindness is a recessive x-linked disorder.
Which genotype represents a male with normal vision?

• X^NX^N
• XⁿXⁿ
• X^NY
• XⁿY

Tags

NGSS.HS-LS3-1