Basic Genetics-Punnett Squares

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%
• all tall
• TT= 75% tt = 25%
• Tt = 100%

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

If brown eyes are dominant over blue eyes, what would be the  parent genotypes if two heterozygous brown eyed persons were crossed?

• BB and bb
• BB and Bb
• Bb and Bb
• bb and Bb

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

• Incomplete Dominance

• Codominance

• Independent assortment

• Recessive inheritance

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?

• 0%
• 25%
• 50%
• 100%

This type of inheritance pattern shows BOTH traits in possible offspring

• complete dominance

• incomplete dominance

• codominance

• dominant pattern

A green pea plant (Gg) is crossed with a yellow pea plant (gg). Describe the genotype of the offspring. (Be sure to remember that the capital letter is dominant).

• 50% heterozygous and 25% homozygous recessive
• 50% heterozygous and 50% homozygous recessive
• 100% homozygous recessive
• 25% heterozygous and 50% homozygous

A white flower (rr) is crossed with a white flower (rr). What is the genotype of the offspring? Draw a Punnett square and answer the question.

• 100% homozygous dominant
• 100% heterozygous dominant
• 100% homozygous recessive
• 100% heterozygous recessive

Which of the following is homozygous recessive?

• rr
• AA
• TT
• Ff

Which of the following is homozygous dominant?

• Jj
• Rr
• MM
• ee