Exam 2: Transmission Genetics

Assuming independent assortment, what phenotypic ratio would you expect to see if an individual with the genotype RrGg is self- crossed?

If an affected individual is born to parents who are unaffected, what is the likely mode of inheritance?

In rabbits, long hair and black fur are produced by the dominant alleles L and B, which assort independently. The genotype ll produces short hair and the genotype bb produces white fur. A cross between a male with short, black fur and a female with long, white fur produces four offspring with short, black fur, four offspring with long, white fur, four offspring with short, white fur, and four offspring with long, black fur. What are the genotypes of the parents?

Mendel performed numerous controlled genetic crosses to obtain strains that consistently produced a single phenotype without variation. What are these strains that consistently produce the same phenotype called?

In Guinea pigs, short hair (S) is dominant over long hair (s), rough coat (R) is dominant over smooth coat (r), and black hair (B) is dominant over white hair (b). Which of the following individuals could produce these (and only these) four possible gametes: SRb, Srb, sRb, srb.

What is the probability of rolling two six- sided dice and obtaining an odd number on at least one die?

In the accompanying figure, if individual IV- 7 has three children with individual IV- 2 what is the probability (to the nearest hundredth) that they would have exactly two affected offspring?

You have self- fertilized a plant with round seeds that is heterozygous, and you want to determine what proportion of the offspring will be dominant and true breeding. probability can be used to calculate the probability of obtaining a particular outcome when specific information about that outcome modifies the probability calculation?

In mice, black coat color is dominant to white coat color. In the pedigree below, mice with a black coat are represented by darkened symbols, and those with white coats are shown as open symbols. What could you conclude regarding the genotype of mouse II- 3 if a testcross resulted in 5 mice with black coat color and 6 mice with white coat color?

Genetic crosses in which F1 plants heterozygous for a given allele are crossed to generate a 3:1 phenotypic ratio in the F2 generation are known as _____.

In some of Mendel's experiments, a cross in which one plant provides the pollen and another with the same genotype provides the egg is followed be another cross in which the first plant provides the egg while the second provides the pollen. During his experiments, these _________ crosses produced identical results.

What is the probability of rolling two six- sided dice and obtaining at least one 3?

Huntington's disease is an autosomal dominant trait. Given the pedigree below, if individual IV- 4 has three children with a normal woman, what is probability that they would have at least one child with the disorder?

What is the probability of rolling two six- sided dice and obtaining two 4's?

Describe the blending theory of heredity and how Mendel's results help to reject this theory.