Exam 2: Mendels Principles of Heredity

Which of the following probabilites is correct regarding a mating of an Ss/RR individual to an individual who is Ss/Rr (a - indicates the the second allele is either dominant or recessive)

What is the difference between cross and self fertilization?

Among the dihybrid crosses below, which will give a 1:1:1:1 ratio?

In the dihybrid cross AaBb *aabb, what proportion of individuals are expected to be homozygotic for both genes in the F₁ generation?

In a dihybrid cross AABB *aabb, what proportion of heterozygotes for both gene pairs is expected among the F₂ offspring?

If individuals 2 and 3 have a child together, what is the probability that the child will exhibit the disease?

Identify the mode of inheritance of the trait.

The actual alleles present in an individual make up the individual's

What is the term for cross(es) between parents that differ in only one trait.

Sickle cell anemia is a recessive trait in humans.In a cross between a father who has sickle cell anemia and a mother who is heterozygous for the gene, what is the probability that their first three children will have the normal phenotype?

The mutations found in the CF gene that result in cystic fibrosis are recessive because

If individuals 4 and 7 have a child, what is the probability that the child will exhibit the trait?

In the dihybrid cross AaBb * aabb, what proportion of heterozygotes for both gene pairs is expected among the F₁ offspring?

If a plant homozygous for liguleless and green leaves is crossed to one homozygous for non-green with ligules, predict the proportion of F₂ progeny with the genotype Llgg.

Assume that in guinea pigs, dark brown fur (B) is dominant to black fur (b).If you mate a black guinea pig with a homozygous brown guinea pig, what proportion of the progeny will be homozygous?

What is the outcome of breeding two plants each pure bred and each having an antagonistic trait?

The first offspring from the parents are called

What is/are the possible genotype(s) of person 4?

An allele that expresses its phenotype even when heterozygous with a recessive allele is termed

Assume that in guinea pigs, dark brown fur (B) is dominant to black fur (b).If you mate a homozygous black guinea pig with a heterozygous brown guinea pig, what proportion of the progeny will be black?