Chapter 11- Mendelian Patters of Inheritance

Mendel's work supported which of the following?

• blending theory of inheritance

• particulate theory of inheritance

• theory of acquired characteristics

• All of these are correct

Mendel's success was based on

• use of the pea plant as a model organism.

• his ability to apply statistics to his studies.

• careful planning of his experiment.

• All of these are correct

Which of the following was discovered by Mendel?

• linkage

• the relationship of genetic behavior to laws of probability

• the location of genes on chromosomes

• the role of chromosomes in sex determination

The law of segregation states that all of the following except

• factors separate during formation of the gametes.

• each individual has two factors for each trait.

• gametes contain a single factor for each trait.

• factors assorted independently of each other by meiosis.

In peas, yellow seed (Y) is dominant over green seed (y). In the F2 generation a monohybrid cross that begins when a dominant homozygote is crossed with a recessive homozygote, you would expect

• three plants with yellow seeds to every plant with green seeds.

• plants with one yellow seed for every green seed.

• only plants with the genotype Yy.

• only plants that produce yellow seeds.

• Both c and d are correct.

An organism's actual gene makeup, often designated by letters like Aa or BB, is the ________.

• karyotype

• phenotype

• linotype

• genotype

In guinea pigs, smooth coat (S) is dominant over rough coat (s), and black coat (B) is dominant over white coat (b). In the cross SsBb x SsBb, how many of the offspring will have a smooth clack coat, on average?

• 1/4

• about 9/16

• 1/16

• 6/16

• 2/6

In horses, B = black coat, b = brown coat, T = trotter, and t = pacer. A black trotter that has a brown pacer offspring has which of the following genotypes?

• BT

• BbTt

• bbtt

• BBtt

• BBTT

Which of the following is not correct for an autosomal recessive pedigree?

• Males inherit the trait 50% of the time.

• Heterozygous individuals are carriers.

• Only homozygous recessive individuals express the trait.

• Homozygous dominant individuals and heterozygous have the same phenotype.

Cystic fibrosis is an example of a/an ____________ trait.

• autosomal dominant

• autosomal recessive

• X-linked

• incomplete dominant