Genetics Question Preview (ID: 11477)


Punnett Squares. TEACHERS: click here for quick copy question ID numbers.

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%

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) 75%
c) 50%
d) 0%

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