Mendel Genetics

For what is Gregor Mendel most well known?

• his experiments with pea plants which showed that certain traits followed predictable patterns of inheritance

• his research on the human genome project

• his research with Charles Darwin studying evolution and inheritance

• the creation of the Punnett square, a tool used by biologists to predict possible genotypes of offspring

What did Mendel believe determined the characteristics of pea plants?

• a blending of the alleles from both parent plants

• inheritance of one allele, received from the healthier parent plant

• inheritance of two alleles, one from each parent plant

• inheritance of two alleles, both from the dominant parent plant

Chickens express three variations for feather color; white, black, and black and white speckled. The genotypes are: WW = white ; BB = black; WB or BW = black and white speckled . What can you conclude about these traits?

• Black and white feather color are codominant.

• Black feather color is dominant and white feather color is recessive.

• White feather color is dominant and black feather color is recessive.

• Black and white feather color exhibits incomplete dominance.

The Punnett square shows a cross between a horse with a pure black coat (CC) and a horse with a pure chestnut coat (cc). The offspring all exhibit black fur. What can be concluded about the trait of a pure chestnut coat?

• It is dominant.

• It is recessive.

• It is neither dominant nor recessive.

• It is a mutation.

In pea plants, green is dominant to yellow. If a yellow pea pod and a green pea pod are crossed, assuming both are homozygous, what genotype should appear in the empty square?

• GG

• gg

• Gg

In pea plants, green is dominant to yellow. If a yellow pea pod and a green pea pod are crossed, assuming both are homozygous, what is the probability the offspring will be green?

• 0%

• 25%

• 50%

• 100%

In his experiments on pea plants, Gregor Mendel crossed peas with red flowers with peas with white flowers. He discovered that the allele for red flowers is dominant over the allele for white flowers. In the Punnett square showing a cross between a red heterozygous flower and a white flower, what genotype should appear in the missing square?

• RR

• Rr

• rr

In his experiments on pea plants, Gregor Mendel crossed peas with red flowers with peas with white flowers. He discovered that the allele for red flowers is dominant over the allele for white flowers. In a cross between a red heterozygous flower and a white flower, what percentage of the offspring will express the recessive trait?

• 0%

• 25%

• 50%

• 100%

The observable traits. This is what you physically look like, or what gene is expressed. ex. Round Yellow

• heredity

• gene

• allele

• genotype

• phenotype

The combination of alleles that you inherited from your parents. This is what you genes look like, the letters. ex. HhGg

• heredity

• gene

• allele

• genotype

• phenotype