Exam 10: Patterns of Inheritance

Linked genes,by definition,are genes that:

The most common allele for any trait is always the dominant allele.

The wide variation in skin color in humans is best explained by:

If a pea plant is homozygous for yellow seeds (YY),which gametes could it produce?

A single chromosome has:

Crossing over is more likely to separate genes on a chromosome if they are:

A sexual life cycle has two main events: meiosis and gamete formation.

Thomas Hunt Morgan chose to work with fruit flies in part because they have a short life cycle and large number of offspring.

Diagrams of gene order and spacing on chromosomes are:

A dihybrid cross is a mating between two individuals that are each ______________ for ___________ gene (genes).

Any dihybrid cross should theoretically yield a 3:1 phenotypic ratio.

Homologous chromosomes have:

The most common phenotype or allele for a gene in a population is referred to as:

Traits that depend on more than one gene are:

In Huntington disease,a child will typically only get the disease if one parent also has it.It is as common in boys as in girls.This disease is:

Hemophilia A is an X-linked recessive disorder.If a normal man marries a woman who is a carrier,what fraction of their daughters will have hemophilia?

The environment only rarely affects gene expression.

Average heights of American men and women have increased steadily since the 1940s.What is the best explanation for this observation?

The fact that the two alleles of each gene are packaged into separate gametes; that they move apart from each other during gamete formation is Mendel's:

If a scientist wanted to carry out a monohybrid cross for stem length in pea plants,which of the following crosses should be performed?