Genetics Concept Check

Two identical alleles (genotype, phenotype, homozygous, heterozygous, dominant, or recessive)

Physical appearance of the organism (genotype, phenotype, homozygous, heterozygous, dominant, or recessive)

Genes of the organism; alleles (genotype, phenotype, homozygous, heterozygous, dominant, or recessive)

weaker allele (genotype, phenotype, homozygous, heterozygous, dominant, or recessive)

Two different alleles (genotype, phenotype, homozygous, heterozygous, dominant, or recessive)

Stronger allele (genotype, phenotype, homozygous, heterozygous, dominant, or recessive)

In plants the tall trait (T) is dominant to the short trait (t). If a homozygous short plant is crossed with a heterozygous plant, what are the parents genotypes?

• TT x tt

• Tt x tt

• TT x Tt

• tt x tt

In plants the tall trait (T) is dominant to the short trait (t). If a homozygous short plant is crossed with a heterozygous plant, what is the probability of having a tall plant?

• 0%

• 25%

• 50%

• 75%

In plants the tall trait (T) is dominant to the short trait (t). If a homozygous short plant is crossed with a heterozygous plant, what is the genotypic ratio?

• 1 TT: 2 Tt: 1 tt

• 0 TT: 4 Tt: 0 tt

• 0 TT: 2 Tt: 2 tt

• 2 TT: 2 Tt: 0 tt

In plants the tall trait (T) is dominant to the short trait (t). If a homozygous short plant is crossed with a heterozygous plant, what is the phenotypic ratio?

• 2 Tall: 2 short

• 0 Tall: 4 short

• 4 Tall: 0 short

• 3 Tall: 1 short