Fall 2007 Exam 1

Fall 2007 Exam 1 - 1 Exam 1 Genetics BIOL 2004 CRN 90827 13...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Exam 1 Genetics BIOL 2004 CRN 90827 13 September 2007 1. In Drosophila melanogaster , the genes M/m, N/n, and O/o independently assort. When a fruit fly of genotype MmNnOo is mated with another fly of identical genotype (opposite sex), what proportion of the progeny flies will be MMNNoo? (1) ½ (2) ¼ (3) 1/8 (4) 1/16 (5) 1/32 (6) 1/64 Background for questions 2 and 3. In dogs, dark coat color (D) is dominant over albino (d) and short hair (S) dominant over long hair (s). The genes independently assort. In across between a dark, short haired parent and a dark, long haired parent the following pups were obtained: 30 dark, short haired, 31 dark, long haired, 9 albino, short haired, and 10 albino, long haired. 2. What was the genotype of the dark, short haired parent? (1) DDSS (2) DdSs (3) DDSs (4) DdSS 3. What was the genotype of the dark, long haired parent? (1) DDss (2) Ddss (3) DDSs (4) DdSs 4. The genetic phenomenon of segregation is due to: (1) Separation of parental alleles during mitosis and cell division (2) Separation of parental alleles after metaphase of meiosis I (3) Division of gametes at meiosis II (4) Random loss of parental alleles during metaphase of meiosis 5. Which of the following differentiate meiosis from mitosis? (1) Chromosome replication occurs during meiosis and not during mitosis (2) Chromosomes condense only in mitosis and not in meiosis (3) Tetrads form only in meiosis (4) Tetrads form only in mitosis (5) Spindle formation only occurs in meiosis (6) Answers (2) and (3) 6. The phenomenon of independent assortment is due to: (1) The random orientation of tetrads at metaphase of meiosis I (2) The separation of parental alleles after metaphase of meiosis I (3) The halving of chromosome number after meiosis II (4) The mutation of maternal and paternal alleles at meiosis I 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background for questions 7-11. In summer squash, white fruit (W) is dominant to yellow (w) and disk-shaped fruit (D) dominant to sphere-shaped (d). The genes are unlinked. A cross was made between true breeding white, disk-shaped fruited plants and true breeding yellow, sphere-shaped fruited plants. The F 1 plants were identical in phenotype and selfed to yield F 2 plants. 7. What is the phenotype of the F 1 progeny? (1) white, disk shaped fruit (2) white, sphere shape fruit (3) yellow, disk shaped fruit (4) yellow, sphere shaped fruit 8. What is the genotype of the F 1 progeny? (1) WWDD (2) WWdd (3) WWDd (4) WwDd (5) wwDd (6) wwdd 9. What is the frequency of WD gametes produced by the F 1 progeny? (1) ½ (2) ¼ (3) 1/8 (4) zero, none can be formed 10. What is the frequency of white, disk shaped fruited plants in the F 2 generation? (1) 9/16 (2) ¾ (3) ½ (4) 3/8 (5) 3/16 (6) 1/16 11. What is the frequency of yellow, disk shaped fruited plants in the F 2 generation? (1) 9/16
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course BIOL 2004 taught by Professor Jofalkinham during the Fall '08 term at Virginia Tech.

Page1 / 8

Fall 2007 Exam 1 - 1 Exam 1 Genetics BIOL 2004 CRN 90827 13...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online