In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What combination of parental alleles will produce all purebred, black-haired offspring?

In pea plants, the trait for green seed pods (G) is dominant over the trait for yellow seed pods (g). Which cross will produce the maximum number of offspring with green seed pods?

Short tails (T) are dominant to long tails (t). What is the probability of a long-tailed mouse in the cross Tt x tt?

In pea plants, purple flowers are dominant over white flowers. A plant that is homozygous for purple flowers is crossed with a plant homozygous for white flowers.

If the offspring from this cross are allowed to self-pollinate (cross with themselves), what will be the ratio of purple to white flowers in the second generation?

The Punnett square shows a cross between a heterozygous tall (Tt) and a homozygous short (tt) pea plant.

What are the correct genotypic and phenotypic ratios of the resulting offspring?