exam03_key_2006 - BTNY 210 Exam 3A KEY April 3, 2006...

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

View Full Document Right Arrow Icon
BTNY 210 Name_________ KEY __________ Exam 3A KEY Lab day and time______________ April 3, 2006 1. Meiosis may occur in the following part(s) of plants: a. anthers b. secondary xylem c. secondary phloem d. apical meristems e. none of the above 2. The number of chromosomes in daughter cells resulting from meiosis is ____________the number in the original cell. a. half b. one fourth c. the same as d. twice e. none of the above 3. If the 2n (diploid) number of an organism is 10, how many chromosomes will there be in each gamete? a. 5 b. 10 c. 12 d. 20 e. 40 4. Considering just one gene that has two alleles, one dominant and one recessive, if we cross a homozygous dominant individual with a homozygous recessive individual, the genotypes of the first generation (F 1 ) will be: a. all heterozygous b. all homozygous dominant c. all homozygous recessive d. half homozygous dominant and half homozygous recessive e, ¾ homozygous dominant and ¼ homozygous recessive 5. Considering the same cross as above, the phenotypes of the F 1 generation should be: a. ¼ dominant b. 1/3 dominant c. ½ dominant d. 2/3 dominant e. none of the above
Background image of page 1

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

View Full DocumentRight Arrow Icon
A homozygous dominant (RR) red apple plant was pollinated by a homozygous recessive (rr) green apple plant. Later an F 1 individual from the above cross was allowed to self- pollinate and produce F 2 offspring. 6. What is the genotype of the original male parent? a. RR b. rr c. Rr d. red e. green 7. What is the phenotypic ratio of the F 2 generation? a. 1:1 b. 2:1 c. 3:1 d. 1:2:1 e. 9:3:3:1 8. What are the genotypes of possible gametes from a parent with a genotype of RrTt (where R is the dominant allele for fruit color and T is the dominant allele for plant height)? a. RrTt
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 02/23/2012 for the course BTNY 210 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

Page1 / 6

exam03_key_2006 - BTNY 210 Exam 3A KEY April 3, 2006...

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