Genetics

Eye color, presence of dimples, hairline shape, and height are all ___, which are the characteristics passed down from parents to offspring through genes.

• inherited traits

• acquired traits

This man is known as the “father of genetics” because of his discovery of the principles of heredity from his experiments with pea plants.

• Robert Hooke

• Gregor Mendel

• Antonie van Leeuwenhoek

• Charles Darwin

What is the difference between a dominant allele and a recessive allele?

• a dominant allele is one whose trait always shows up when the allele is present; a recessive allele is hidden whenever the dominant allele is present

• a recessive allele is one whose trait always shows up when the allele is present; a dominant allele is hidden whenever the recessive allele is present

A purebred organism has a ___ genotype.

• homozygous

• heterozygous

A hybrid organism has a ___ genotype.

• homozygous

• heterozygous

An organism's genetic makeup, or its combination of alleles is its ___.

• phenotype

• genotype

• probability

• acquired trait

Which is an example of an acquired trait?

• height

• skin color

• number of fingers

• dyed hair color

What is the probability of the offspring genotype for this genetic cross?

• 75% RR, 25% rr

• 25% Rr, 50% RR, 25% rr

• 25% RR, 50% Rr, 25% rr

• 100% Rr

What is the probability of the offspring phenotype for this genetic cross?

• 75% purple, 25% white

• 25% purple, 75% white

• 50% purple, 50% white

• 100% purple

The picture shows Mendel's classic experiment where he crossed a purebred tall and a purebred short (P generation). Which allele is dominant?

• tall

• short