X and Y chromosomes explained

How many pairs of chromosomes do humans typically have?

• 22

• 23

• 46

• 1

What combination of sex chromosomes determines a female?

• XY

• XX

• YY

• XO

Which of these conditions is mentioned as being caused by X-linked genes?

• Diabetes

• Asthma

• Red-green color blindness

• High blood pressure

Why are X-linked recessive traits more commonly expressed in males than in females?

• Males have two X chromosomes.

• Males have a Y chromosome that cannot mask recessive genes on the X chromosome.

• Females do not carry X-linked genes.

• Males have more dominant genes.