Genetics review

Match term to definition

• segment of DNA that controls trait

• Gene

• Allele that masks or overshadows others

• heterozygous

• Name of monk who studied heredity

• dominant
• Term that refers to sex cells

• Mendel

• Possessing two different alleles (ex:Tt)

• Gamete

Match term with description

• offspring of parents w/ different traits

• Punnett square

• diagram of allele combinations

• mutation

• different versions of genes

• hybrid
• error that occurs in a gene

• peas

• types of plants mendel used

• allele

Mendel considered those traits that were hidden in the first generation to be:

• heterozygous

• recessive

• incompletely dominant

• incapable of breeding true

• incapable of being inherited

Brown eye color is dominant; blue eye color is recessive. If a brown-eyed man marries a blue-eyed woman and they have a brown-eyed son and a blue-eyed daughter, we can safely conclude that:

• the man is not the true father

• the man is heterozygous

• eye color is sex-linked

• the man has the genotype for blue eyes but the phenotype for brown eyes.

If pure-breeding tall peas are crossed with dwarf peas, the resulting offspring will always be tall. This illustrates Mendel's law of:

• segregation

• unit characters

• dominance

• independent assortment

Which of the following would be a homozygous recessive individual?

• Tt

• tt

• t

• both tt and TT

Mendel's principle of segregation states that factors separate during:

• fertilization

• gamete formation

• cross-pollination

• seed dispersal

When pure-breeding pea plants with round seeds are bred with pure-breeding pea plants with wrinkled seeds, all of the F1 offspring produce round seeds. What offspring might be expected if the F1 offspring are allowed to self-pollinate?

• All of the offspring will have round seeds.

• All of the offspring will have wrinkled seeds.

• Three-fourths of the offspring will have round seeds.

• Three-fourths of the offspring will have wrinkled seeds.

• One-fourth of the offspring will have round seeds.

The appearance of an organism, such as smooth versus wrinkled seeds, is referred to as:

• genotype

• variety

• phenotype

• factor

• allele

The genetic makeup of an organism is called:

• a gene pool

• its phenotype

• a trait

• an allele

• its genotype