Bio Quarterly 3 review '25

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous genes
• mutated DNA

Aa is

• homozygous (purebred)
• heterozygous (hybrid)

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

T = tall an t = short
What is the phenotype for Tt?

• short
• tall
• medium sized
• neither tall or short

How many alleles (letters) do each person carry for a trait?

• 1
• 2
• 3
• 4

How many alleles (letters) does a child get from each parent for each trait?

• 1
• 2
• 3
• 4

In a Punnett square each box represents a(n)....

• offspring
• parent
• gene
• trait

How many chromosomes are in a sex cell?

• 46
• 23
• 26
• 43

The passing of physical characteristics from parent to offspring is __________.

• genetics
• heredity
• genes
• traits