Inheritance and Probability - Quiz - Biology Articles, Tutorials & Dictionary Online

Quiz

Multiple choice: choose the best answer.

1. In Mendelian genetics, the genotype, "Rr", means ...

a. the recessive allele

b. the offspring with "R" allele will show the trait

c. the recessive allele is always expressed in the presence of "R" allele.

d. None of the above

2. A Punnett square is a useful tool in ...

a. predicting possible genotypes of offsrping

b. predicting possible traits of offspring

c. determining genotypic and phenotypic ratios

d. all of the above

3. Based on Mendelian inheritance, the genotypic ratio of a testcross between YY and Yy is ...

a. 3:1, meaning for every four offspring, three of them will have YY genotype

b. 2:2, meaning for every four offspring, half of them will have YY genotype while the other half will have Yy genotype

c. 4:0, meaning all of the offspring will have YY genotype

d. 4:0, meaning all of the offspring will have Yy genotype

4. In Mendelian inheritance, a cross between Aa and Aa will ...

a. result in all offspring exhibiting the dominant trait.

b. produce offspring that are all hybrids.

c. likely produce an offspring with a recessive trait.

d. never produce an offspring with AA genotype.

5. In BB and bb test cross, which of the following statements is incorrect?

a. The offspring will be a carrier of a recessive allele.

b. One of the four offspring will have a genotype of Bb.

c. All offspring will express the dominant phenotype.

d. If two of their offspring are crossed, one of the offspring will likely express the recessive phenotype.

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