Sex Linked Traits

The sex of a child is determined by:

• Whether the father's sperm contains an X or Y chromosome

• Whether the mother's egg contains an X or Y chromosome

• The age of the parents

• The presence or absence of proteins in the mother's womb

Tags

NGSS.HS-LS3-1

An individual's sex is determined by:

• 1 of 23 chromosomes

• 2 of 46 chromosomes

• 4 of 92 chromosomes

• 2 of 23 chromosomes

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

• Males have more testosterone

• Males have less DNA

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

• Females have 1 Y chromosome to mask the trait

Tags

NGSS.HS-LS3-1

When we say that a woman is a carrier for a genetic disease or disorder it means that:

• She has 1 gene, but not the disorder

• She has 2 genes for the disorder

• She can pass the gene only to male children

• She can pass the gene only to female children

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 a:

• Sex-linked trait

• Polygenic trait

• Co-dominant 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?

• XX^h

• X^hX^h

• XX

• 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?

• XX^h

• X^hX^h

• XY

• X^hY

Hemophilia (h) is an x-linked recessive trait. What are the chances that a daughter would be a carrier? NOTE: X and X^H mean the same thing.

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The bison herd on Konza Prairie has a sex-linked trait known as “rabbit hock” in which the knee of the back leg is slightly malformed. A male bull that is normal mates with a cow that is a carrier for rabbit hock. What are his chances of producing a normal male?

• 0%

• 25%

• 50%

• 100%

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-LS3-3