Chapter 11 - Genetics & Meiosis Review Questions (w/ Answers)
Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
____ 1. A trait is a specific characteristic that varies from one individual to another. _________________________
____ 2. Gregor Mendel concluded that the tall plants in the P generation passed the factor for tallness to the F1
generation. _________________________
____ 3. An organism with a dominant allele for a particular form of a trait will sometimes show that trait.
_________________________
____ 4. True-breeding plants that produced axial flowers were crossed with true-breeding plants that produced
terminal flowers. The resulting offspring produced terminal flowers because the allele for terminal flowers is
recessive. _________________________
____ 5. When alleles segregate from each other, they join. _________________________
____ 6. If the alleles for a trait did not segregate during gamete formation, offspring would always show the trait of at
least one of the parents. _________________________
____ 7. The principles of probability can explain the numerical results of Mendel’s experiments.
_________________________
____ 8. The probability that a gamete produced by a pea plant heterozygous for stem height (Tt) will contain the
recessive allele is 100%. _________________________
____ 9. If roan cows and roan bulls are mated, according to the principle of codominance, 25% of the offspring are
expected to be roan. _________________________
____ 10. Coat color in rabbits is determined by a single gene that has multiple alleles. _________________________
____ 11. If an organism has 16 chromosomes in each of its egg cells, the organism’s diploid number is 32.
_________________________
____ 12. If an organism is heterozygous for a particular gene, the two different alleles will be separated during
anaphase II of meiosis, assuming that no crossing-over has occurred. _________________________
____ 13. Mitosis results in two cells, whereas meiosis results in one cell. _________________________
Completion
Complete each statement.
14. The plants that Gregor Mendel crossed to produce the F1 generation made up the ____________________
generation.
15. The different forms of a gene are called ____________________.
16. If the allele for shortness in pea plants were dominant, all the pea plants in Mendel’s F1 generation would
have been ____________________.
17. If the alleles for traits in pea plants did not segregate during gamete formation, offspring that were recessive
for a trait could be produced only by crossing two plants that were ____________________ for that trait.
18. ____________________ is the likelihood that a particular event will occur.
