13. Mendelian Genetics

Punnett Square Probability

13. Mendelian Genetics

# Punnett Square Probability - Video Tutorials & Practice Problems

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concept

### Punnett Square Probability

Video duration:

3mPlay a video:

2

concept

### Rule of Multiplication (the AND Rule)

Video duration:

6mPlay a video:

3

Problem

ProblemCalculate the probability of 2 heterozygous (Rr) parents having 3 homozygous recessive (rr) offspring.

A

1/32.

B

1/16.

C

3/16.

D

1/64.

E

3/4.

4

concept

### Rule of Addition (the OR Rule)

Video duration:

5mPlay a video:

5

Problem

ProblemWhat is the probability that a plant from a monohybrid cross of heterozygous parents, is homozygous dominant OR homozygous recessive?

A

½.

B

¼.

C

¾.

D

1.

6

Problem

ProblemA blue-eyed female that is homozygous recessive and a brown-eyed male that is heterozygous mate, producing two offspring. What is the probability that one child will have blue eyes AND one will have brown eyes? (Eye color is controlled by a single gene).

A

½.

B

¼.

C

¾.

D

1.

7

Problem

ProblemA homozygous dominant male has a child with a heterozygous female. What is the probability that the child will have the same genotype as its father OR its mother?

A

½.

B

¼.

C

¾.

D

1.

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PRACTICE PROBLEMS AND ACTIVITIES (10)

- A man has six fingers on each hand and six toes on each foot. His wife and their daughter have the normal numb...
- DRAW IT Two pea plants heterozygous for the characters of pod color and pod shape are crossed. Draw a Punnett ...
- Flower position, stem length, and seed shape are three characters that Mendel studied. Each is controlled by a...
- Tim and Jan both have freckles but their son Mike does not. Show with a Punnett square how this is possible. I...
- The genotype of F1 individuals in a tetrahybrid cross is AaBbCcDd. Assuming independent assortment of these fo...
- Both Tim and Jan have a widow's peak (see Module 9.8), but Mike has a straight hairline. What are their genoty...
- What is the probability that each of the following pairs of parents will produce the indicated offspring? (Ass...
- In rabbits, black hair depends on a dominant allele, B, and brown hair on a recessive allele, b. Short hair is...
- In fruit flies, the genes for wing shape and body stripes are linked. In a fly whose genotype is WwSs, W is li...
- SCIENTIFIC THINKING The breakthrough that led Bateson and Punnett to recognize the existence of linked genes w...