Polygenic and sex-linked traits

What percentage of the offspring will have this recessive disease?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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-LS3-2

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

Tags

NGSS.HS-LS3-1

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

• males are the weaker sex

• males have less DNA

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

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

NGSS.HS-LS3-2

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, red eye color (R) is a sex-linked trait that is dominant over white eye color (r).

According to the Punnett square, what percentage of female offspring will have red eyes?

• 75%

• 25%

• 0%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

An example of polygenic inheritance is...

• Skin Color

• hitch hikers thumb

• blood types

How many alleles does someone have for a genotype?

• 1

• 2

• 3

• 4

Which genotype would result in an individual with the darkest colored skin? (Hint: Look at the number of dominant vs recessive alleles, not the letter).

• AABBCC

• AABBcc

• AaBbcc

• Aabbcc

Tags

NGSS.HS-LS3-1