Unit 3 Review

Two parents have a heterozygous genotype for eye color. What is the chance of having a blue eye baby?

• 0%

• 25%

• 50%

• 75%

• 100%

A heterozygous woman marries a man who is homozygous recessive. What are the chances of a curly hair baby?

• 0%

• 25%

• 50%

• 75%

• 100%

A homozygous dominant woman marries a man with freckles. What are the chances of a freckled baby?

• 0%

• 25%

• 50%

• 75%

• 100%

A heterozygous woman marries a man who is heterozygous. What are the chances of a straight hair baby?

• 0%

• 25%

• 50%

• 75%

• 100%

What are genes?

• Something you wear.
• Segments of DNA that carry traits for offspring.
• The powerhouse of cells.
• None of the above.

Which of the following genotypes are purebred?

• Pf
• Pp
• PP
• pP

If you are purebred dominant for a trait, your genotype would be...

• Tt
• TT
• tt
• tall

Which of these is homozygous recessive?

• Rr
• rR
• RR
• rr

The different forms of a gene

• alleles

• atoms

• proteins

• wheels

This trait always shows up in an organism when the allele is present

• dominant allele

• codominance

• probability

• recessive allele