Exam 11: Patterns of Inheritance

Based on this figure, what is the genotype of an individual pea plant that is homozygous for green pod and constricted pod and is 6 feet tall? (Assume that green and yellow pods are indicated by G and g, inflated and constricted pods by I and i, and height by T and t.)

Only males can express sex- linked traits.

Two parents with normal vision have two sons, one color deficient and one with normal vision. If this couple then has six daughters, can you predict what percentage of the daughters will have normal color vision?

An individual who is a carrier for a sex- linked trait such as hemophilia

All of the following are true regarding pedigree analysis EXCEPT that it

Gregor Mendel concluded that each pea has two units for each trait, and each gamete contains one unit. Mendel's "units" are now called

Imagine that smurfs live in widely separated groups and rarely interbreed, so geneticists know very little about them. On one occasion, two smurfs from different groups did mate. A big- footed, white smurf mated with a small- footed, blue smurf. Three offspring resulted: one big- footed and blue and two small- footed and blue. Which statement about the inheritance of color in smurfs is most likely to be correct?

The location of a gene on a chromosome is called a(n) .

What would be TRUE if linkage of two genes was complete?

Yellow- seeded pea plants may be homozygous or heterozygous. To find out which, cross the plants with

The failure of chromosomes to segregate properly during meiosis is called

Traits controlled by sex- linked recessive genes are expressed more often in males because

Although the law of independent assortment is generally applicable, when two loci are located physically close to each other on the same chromosome, the phenotypes of the offspring sometimes do not fit the phenotypes predicted. This is due to

When genes are linked, a few of the recombinant genotypes still occur in the offspring because of

Crossing smooth- seeded pea plants with wrinkled- seeded pea plants resulted in progeny that all had smooth seeds. This indicates that the wrinkled- seed trait is

A recessive allele on the X chromosome causes color deficiency. A noncolor- deficient woman (whose father is color deficient) marries a color- deficient man. If they have a son, what is the chance that he will be color deficient?

If an individual who is homozygous for type B blood marries a heterozygous type A individual, what is the chance that their first child will have type AB blood?

Sex- linked traits affect only sexual characteristics.

A recessive allele on the X chromosome causes color deficiency. A color- deficient boy has a mother with normal vision and a color- deficient father. From which parent did he get the color- deficiency gene?

The physical manifestation of an organism's genes is its