Sex-Linked

An individual's sex is determined by 

• 1 of 23 chromosomes
• 2 of 46 chromosomes
• 4 of 92 chromosomes

Why are men 16 times more likely to be color-blind than women?

• to be color-blind, you must have a Y chromosome
• to be color-blind, all of your X chromosomes must have the gene
• color-blindness is caused by testosterone
• color-blindness is caused by the same gene as baldness

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

Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?

• X^HX^h
• X^hX^h
• X^HY
• X^hY

What percentage of the offspring will have this recessive disease?

• 0%
• 25%
• 50%
• 75%

How many PAIRS of chromosomes do humans have?

• 23
• 46
• 1
• 2

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

• Male
• Female

I have 2 X chromosomes. 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

Alternative forms of a gene are called

• Alleles
• Homozygous
• DNA
• Genetics