Exam 8: Patterns of Inheritance

During meiosis I, homologous chromosomes undergo chiasma formation.Which of the following can happen now when the homologous chromosomes synapse or contact each other?

The average number of crossovers between two alleles is known as which of the following? (Outome #IIIb)

In pea plants, the allele for round peas (R) is dominant to the allele for wrinkled peas (r).A gardener has a plant he got from his neighbor that produces round peas, but he does not know its genotype.What simple procedure could he do to determine the genotype of his new plant?

A gardener received a pea plant from her neighbor, and she wants to know its genotype.The neighbor told her it produces round peas, which is a dominant trait (R) to wrinkled peas (r).The gardener performs a test cross and observes that half of the offspring plants produce wrinkled peas.What is the genotype of the plant she received from her neighbor?

Mendel's hybridizations may best be described as which of the following?

Hemophilia is not seen in individuals heterozygous for the hemophilia gene.Thus, the disease is:

Which of the following is not considered a chromosomal abnormality?

Trait A is dominant to trait a, and trait B is dominant to trait b.If an AaBB mother mates with an AaBb father, what percent of the offspring will have the aaBB genotype?

How could you determine the distance between two genes using experimental matings?

A gene can be best defined as which of the following?

The father of modern genetics was:

The genetic makeup of an organism and its physical appearance are its ________ and ________, respectively.(Outcome #IIIa)

The number and appearance of a cell's chromosomes, including lengths, banding patterns, and centromere positions, are collectively called what?

Two genes located near each other on the same chromosomes are said to be:

Johann Gregor Mendel's work in genetics focused on traits that exhibit discontinuous variation.What kind of traits are these?

The modern theory that explains Mendelian inheritance is called what?

A man's mother died from having the neurodegenerative genetic disorder Huntington's disease, which is caused by a dominant mutant allele that exhibits high penetrance.The man's daughter wants to be tested for the mutant gene, and he tells her not to bother because her probability of having the disease is zero.Is he telling her the truth? Choose the most accurate answer.(Outcome #IIIa)

Which best describes genotype and phenotype, respectively?

All of the following are disorders in chromosome number except:

Huntington's disease (HD) is a neurodegenerative genetic disorder involving an autosomal dominant mutant allele with high penetrance.If a father's mother had HD, what is the probability that his first child will also have HD?