Ch 11 Review

Offspring that result from crosses between true-breeding parents with different traits

• are true-breeding.

• make up the F2 generation.

• make up the parental generation.

• are called hybrids.

When Mendel crossed true-breeding tall plants with true-breeding short plants, all the offspring were tall because

• the allele for tall plants is recessive.

• the allele for short plant is dominant.

• the allele for tall plants is dominant.

• they were true-breeding like heir parents.

The principles of probability can be used to

• predict the traits of the offspring produced by genetic cross.

• determine the actual outcomes of genetic crosses.

• predict the traits of the parents used in genetic crosses.

• decide which organisms are best to use in genetic crosses.

A Punnett square shows all of the following EXCEPT

• all possible results of a genetic cross.

• the genotypes of the offspring.

• the alleles in the gametes of each parent.

• the actual results of a genetic cross.

How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY?

• 2

• 4

• 8

• 16

A cross of a white hen with a black rooster produces erminette-color offspring. This type of inheritance is known as

• incomplete dominance.

• polygenic inheritance.

• codominance.

• multiple alleles.

If an organism's diploid number is 12, its haploid number is

• 12.

• 6.

• 24.

• 3.

Chromosomes form tetrads during

• prophase of meiosis I.

• metaphase of meiosis I.

• prophase of meiosis II.

• metaphase of meiosis II.

Unlike mitosis, meiosis results in the formation of

• two genetically identical diploid cells.

• four genetically different haploid cells.

• four genetically identical haploid cells.

• two genetically different diploid cells.

Linked genes

• are never separated.

• assort independently.

• are on the same chromosome.

• are always recessive.