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In Labrador retrievers, black coat color is dominant to brown. Suppose that a black lab is mated with a brown lab and the offspring are three black puppies and one brown puppy. What can you conclude about the genotype of the black parent?

Plants that are RR have red flowers and plants that are rr have white flowers. However, Rr plants have pink flowers. What type of inheritance does this demonstrate for flower color in these plants?

What type of cell division do prokaryotic cells undergo?

In Labrador retrievers, black coat color is dominant to brown. Suppose that a black lab is mated with a brown lab and the offspring are three black puppies and one brown puppy. What can you conclude about the genotype of the black parent?

You discover a new amphibian and name the sex chromosomes A and B. If the female is heterogametic and the male is homogametic, then what could be the chromosome arrangement of sex chromosomes in the adult?

A trait produced by a set of alleles is the

A child who has blood-type A has a mother who has blood-type B. In a paternity suit, a man is accused of being the father. He has blood-type AB. Is he the father?

In the example below, how many chromosomes are in each cell in prophase and in anaphase?

How does incomplete dominance differ from incomplete penetrance?

The shape of the combs of chickens is determined by alleles at two different loci (A and B). In order for a chicken to have a walnut comb, it must have a dominant allele at both loci. A rose comb results from a dominant allele at the first locus but homozygous recessive at the second locus. A pea comb results from homozygous recessive at the first locus and a dominant allele at the second locus. Homozygous recessive at both loci results in a single comb. How many progeny will have rose combs from the following cross? AaBb x aabb