Chapter 10 Study Guide Answers
Name: ______________________________________________________ Period:_____
Chapter Review: 10 Mendel & Meiosis College Biology
1. An organism that is true breeding for a trait is said to be
(a) homozygous (b) heterozygous (c) a monohybrid (d) a dihybrid
2. At the end of meiosis, how many haploid cells have been formed from the original cell?
(a) one (b) two (c) three (d) four
3. When Mendel transferred pollen from one pea plant to another, he was ___ the plants.
(a) self pollinating (b) cross pollinating (c) self fertilizing (d) cross fertilizing
4. A short pea plant is
(a) homozygous recessive (b) homozygous dominant (c) heterozygous (d) a dihybrid
5. Which describes a dominant trait in garden peas?
(a) wrinkled, yellow peas (b) inflated, yellow pods (c) round green peas (d) purple, axial flowers
6. During what phase of meiosis do homologous chromosomes cross over?
(a) prophase I (b) anaphase I (c) telophase I (d) telophase II
7. Recessive traits appear only when an organism is
(a) mature (b) different from its parents (c) heterozygous (d) homozygous
8. Mendel’s use of peas was a good choice for genetic study because
(a) they produce many offspring (b) they are easy to grow (c) they can be self-pollinating (d) all of these
9. A dihybrid cross between two heterozygous parents produces a phenotypic ratio of
(a) 3:1 (b) 1:2:1 (c) 9:3:3:1 (d) 1:6:9
10. If two heterozygous organisms for a single dominant trait mate, the ratio of their offspring should be about ________3:1____________________________.
11. A trait that is hidden in the heterozygous condition is said to be a _________recessive________________ trait.
12. An organism that has two different alleles for a trait is called ___heterozygous__________________.
13. The process that results in Down syndrome is called ________nondisjunction______.
14. If a species normally has 46 chromosomes, the cells it produces by meiosis will each have
Chapter Review: 10 Mendel & Meiosis College Biology
1. An organism that is true breeding for a trait is said to be
(a) homozygous (b) heterozygous (c) a monohybrid (d) a dihybrid
2. At the end of meiosis, how many haploid cells have been formed from the original cell?
(a) one (b) two (c) three (d) four
3. When Mendel transferred pollen from one pea plant to another, he was ___ the plants.
(a) self pollinating (b) cross pollinating (c) self fertilizing (d) cross fertilizing
4. A short pea plant is
(a) homozygous recessive (b) homozygous dominant (c) heterozygous (d) a dihybrid
5. Which describes a dominant trait in garden peas?
(a) wrinkled, yellow peas (b) inflated, yellow pods (c) round green peas (d) purple, axial flowers
6. During what phase of meiosis do homologous chromosomes cross over?
(a) prophase I (b) anaphase I (c) telophase I (d) telophase II
7. Recessive traits appear only when an organism is
(a) mature (b) different from its parents (c) heterozygous (d) homozygous
8. Mendel’s use of peas was a good choice for genetic study because
(a) they produce many offspring (b) they are easy to grow (c) they can be self-pollinating (d) all of these
9. A dihybrid cross between two heterozygous parents produces a phenotypic ratio of
(a) 3:1 (b) 1:2:1 (c) 9:3:3:1 (d) 1:6:9
10. If two heterozygous organisms for a single dominant trait mate, the ratio of their offspring should be about ________3:1____________________________.
11. A trait that is hidden in the heterozygous condition is said to be a _________recessive________________ trait.
12. An organism that has two different alleles for a trait is called ___heterozygous__________________.
13. The process that results in Down syndrome is called ________nondisjunction______.
14. If a species normally has 46 chromosomes, the cells it produces by meiosis will each have