# Genetics: Question Preview (ID: 11477)

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**Punnett squares can be used to predict the probability of:**

a) being exposed to a contagious disease and contracting it

b) neither of the above

c) both of the above

d) having an inherited disease or a genetically determined physical trait

**If two people who are both carriers for a genetically inherited fatal recessive disease decide to become parents, what will be the odds that their children will also be carriers?**

a) 1 out of 4

b) 4 out of 4

c) 3 out of 4

d) 2 out of 4

**If a woman is homozygous normal and her husband is heterozygous for a recessive disease and they decide to become parents, what is the probability that their child will be healthy?**

a) 1 out of 4

b) 4 out of 4

c) 3 out of 4

d) 2 out of 4

**One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). What is the probability of one of their offspring having long hair**

a) 100%

b) 25%

c) 50%

d) 75%

**If two parents are heterozygous for a genetically inherited dominant trait, what is the probability that they will have a child together who has this trait in his or her phenotype?**

a) 100%

b) 25%

c) 50%

d) 75%

**One flower is heterozygous red (Rr) and it is crossed with a homozygous white (rr) plant. Use a Punnett square to determine the probability of one of their offspring being red?**

a) 100%

b) 25%

c) 50%

d) 75%

**One flower is heterozygous red (Rr) and it is crossed with a homozygous white (rr) plant. Use a Punnett square to determine the probability of one of their offspring being white .**

a) 100%

b) 25%

c) 50%

d) 75%

**In a certain species of plant, the color purple (P) is dominant to the color white (p). What is the probability of purple offspring from PP x Pp?**

a) 100%

b) 0%

c) 25%

d) 75%

**In a certain species of pine trees, short needles (S) are dominant to long needles (s). What is probability of long needles with Ss x ss?**

a) 100%

b) 0%

c) 50%

d) 75%

a) 100%

b) 75%

c) 50%

d) 0%

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