Genetics

Test Description: Punnett Squares

Instructions: Answer all questions to get your test result.

1) In bears, dark fur (F) is dominant over light fur (f). A heterozygous male and recessive female breed. What is the probability that they'll have a baby bear who is also heterozygous?

2) In flowers, pink petals (P) are dominant over white (p). If a flower that is homozygous for its pink color breeds with a white flower, what is the probability their offspring will be homozygous for pink color as well?

3) In corn, large kernels (K) are dominant over small kernels (k). If two heterozygous corn are bred, what is the probability that the corn produced will have small kernels?

4) In ants, a black exoskeleton (E) is dominant over a red exoskeleton (e). If two heterozygous ants breed 100 baby ants, how many will have a black exoskeleton?

5) In certain species of coral, curling structure (S) is dominant over straight structure (s). If a coral heterozygous for its structure reproduces with a coral that has straight structure, what is the chance the new coral will have straight structure?

6) If a Hh x Hh cross occurs, what is the probability of the offspring having the homozygous dominant genotype?

7) If an AA x aa cross occurs, what is the probability the offspring will be heterozygous?

8) If a Nn x nn cross occurs, what is the probability of the offspring having a dominant phenotype?

9) If a Dd x DD cross occurs, what is the probability of the offspring having a recessive phenotype?

10) If a Rr x Rr cross occurs, what is the probability that the offspring will have the dominant phenotype?

11) In Monarch butterflies, orange wings (W) are dominant over yellow wings (w). If two heterozygous Monarchs produce 200 offspring, approximately how many will be orange?

12) If a Gg x gg cross occurs, what is the probability the offspring will have the homozygous recessive genotype?

13) In cows, black splotches (S) are dominant over brown splotches (s). If a homozygous dominant cow breeds with a brown cow, what is the probability they'll have a brown calf?

14) In a certain breed of dogs, wide snouts (S) are dominant over narrow snouts (s). If two heterozygous dogs breed, they'll have a 50% chance of producing what genotype?

15) In peas, pea pods of 5 peas (P) is dominant over pea pods of 3 peas. If a homozygous 5-pod pea plant breeds with a 3-pod pea plant, there is a 100% chance of producing what genotype offspring?

16) In a certain species of fish, blue scales (S) are dominant over yellow scales (s). If two heterozygous fish create 100 fertilized eggs, which genotypes will exist in about 50 eggs, or 25 each?

17) In chickens, black feathers (F) are dominant over brown feathers (f). If a heterozygous chicken and brown chicken reproduce, what possible genotypes could account for 100% of the offspring, respectively?


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