Genetics Practice

An organism's physical appearance, or visible traits.

• genotype

• phenotype

• heterozygous

• homozygous

Tall is dominant to short in pea plants. What's the phenotype for a plant with the genotype tt?

• heterozygous

• homozygous dominant

• homozygous recessive

• Tall

• Short

two of the same allele inherited from both parents

• genotype

• phenotype

• heterozygous

• homozygous

different versions of a trait for a specific gene

• allele

• gene

• dominant

• recessive

• hybrid/carrier

an allele that is always expressed in patterns of complete dominance; masks recessive traits

• allele

• gene

• dominant

• recessive

• hybrid/carrier

Tall is dominant to short in pea plants. Cross two heterozygous pea plants. Which are the correct ratios?

• 1 TT : 2 tt : 1 Tt

• 1 Tt : 1 tt : 2 TT

• 1 TT : 2 Tt : 1 tt

• 3 tall : 1 short

• 3 short : 1 tall

An allele that is masked when a dominant allele is present

• allele

• gene

• dominant

• recessive

• hybrid/carrier

organisms that have inherited two different alleles from their parents

• allele

• gene

• dominant

• recessive

• hybrid/carrier

Tall is dominant to short in pea plants. What's the genotype for a tall plant? Check all that apply if needed

• heterozygous

• homozygous dominant

• homozygous recessive

• Tall

• Short

Tall is dominant to short in pea plants. What's the phenotype for a plant with the genotype TT?

• heterozygous

• homozygous dominant

• homozygous recessive

• Tall

• Short