X-linked inheritance

What is an X-linked trait?

• A trait found on the Y chromosome

• A trait found on the X chromosome

• A trait found only in males

• A trait that skips generations

Tags

NGSS.HS-LS3-1

How many genes are found on the X chromosome compared to the Y chromosome?

• 200 on X and 500 on Y

• 500 on X and 200 on Y

• 70 on X and 800 on Y

• 800 on X and 70 on Y

What can a female be in relation to a recessive X-linked disease?

• Not affected

• All of the above

• A carrier

• Affected

Why do males have a greater chance of inheriting an X-linked disease?

• Because the X chromosome is recessive

• Because they have one X chromosome

• Because the Y chromosome is dominant

• Because they have two X chromosomes

What does the Punnett square for an X-linked disease show?

• The probability of inheriting a dominant trait

• The probability of inheriting a recessive trait

• The inheritance pattern of an X-linked disease

• The inheritance pattern of a Y-linked disease