Mendelian Inheritance

Question 1

What type of inheritance did Mendel discover?

Complete/Incomplete/Codominant

Answer 1

Complete Dominance

Question 2

What kind of plants did Mendel use in his experiments?

Answer 2

Pea plants

Question 3

What were the two points of Mendel’s Law of Segregation?

Answer 3

1. Each organism carries two alleles for each trait
   - ex. allele 1 = B, allele 2 = B, trait = BB
2. Each parent gives one allele for each trait

Question 4

A homozygous individual has a genotype of…

Answer 4

BB or bb

Question 5

A heterozygous individual has a genotype of…

Answer 5

Bb

Question 6

Define complete dominance.

Answer 6

The expression of a dominant allele even when a recessive allele is present.

Question 7

Two parents, one blue and one yellow, create a green child. This is a display of ____ dominance.

Answer 7

Incomplete dominance.

Question 8

With codominance, a red parent and a blue parent would create a ____ child.

Answer 8

Red and blue child.

Question 9

T/F: Codominance blends traits.

Answer 9

False. Codominance creates a “collage”.

- ex.) speckled hens, roan cows, spotted dogs, etc.

Question 10

Two lowercase letters represent a ______ trait.

Answer 10

Recessive trait.

- ex.) pp represents a white flower instead of purple (dominant).

Question 11

Challenge: A species of flowers express incomplete dominance. Homozygous flowers are either red or white. Two heterozygous parents are bred. What is the phenotype percentage of the F1 offspring?

Answer 11

Parent one: RW (pink). Parent two: RW (pink)

Offspring: 25% RR (red). 50% RW (pink). 25% WW (white).