Mendelian Genetics

If a heterozygous tall pea plant is crossed with a short pea plant (recessive), what are the possible genotypes of the future offspring?

• 100% Tt
• 50% Tt, 50% tt
• 75%Tt, 25%tt
• 25%TT, 50%Tt, 25%tt

What is the predicted percentage of homozygous recessive offspring in this cross?

• 0%

• 25%

• 50%

• 75%

What is the probability that the offspring will express the dominant trait?

• 25%

• 50%

• 75%

• 100%

What are the parents' genotypes?

• Homozygous for brown eyes
• Heterozygous for brown eyes
• Homozygous for blue eyes
• Heterozygous for blue eyes

A phenotype is the ___________ of an organism.

• Dominance

• Physical appearance

• Recessiveness

• Alleles / Genes

A version of a gene is called a(n)

• allele

• characteristic

• specific gene

• trait

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

In a heterozygous genotype, the ___________ allele is expressed in the phenotype.

• recessive
• dominant
• homozygous

• heterozygous

If "T" is the dominant allele for tall and "t" is the recessive allele for short, then what phenotype would "Tt" produce?

• tall
• short
• medium
• not enough info

In the Punnett Square below, which genotype belongs in the missing square?

• tt
• Tt
• Bb
• TT