Genetics Test Review 4/12

Which term refers to the passage of genetic instructions from one generation to the next?

• DNA

• behavior

• heredity

• inheritance

Which term refers to physical characteristics that are studied in genetics?

• generations

• hybrids

• offspring

• traits

Which term refers to an organism’s physical appearance, or visible traits?

• genotype

• inheritance

• phenotype

• recessive allele

Mendel concluded that the alleles for tall stems in pea plants are dominant. Thus, crossing a purebred tall pea plant with a purebred short pea plant should result in

• all tall plants.

• all short plants.

  .

• all medium height plants.

• half short and half tall plants

A rabbit is homozygous recessive for fur color. This statement describes the rabbit's

• phenotype.

• genotype.

• acquired traits.

• biological classification.

What is the term that describes an organism that has two identical dominant or two identical recessive alleles for a particular trait?

• codominant

• heterozygous

• homozygous

• phenotype

The different forms of a gene are referred to as

• phenotypes.

• genotypes.

• alleles.

• traits.

How a trait such as flower color is physically expressed after being passed from one generation to the next generation is called a(n)

• allele.

• chromosome.

• genotype.

• phenotype

In pea plants, the allele for tallness (T) is dominant to the allele for shortness (t). The Punnett square shows a cross between two pea plants that are heterozygous for height.

Which genotype or genotypes produce short pea plants?

• tt only

• Tt only

• TT only

• TT and tt

Homozygous

• RR

• Rr

• Tt

• Ff