Midterm I - Key

Midterm I - Key - Name Student ID Bio 50 Midterm I 100...

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Name ______________________________ Student ID # ________________________ Bio 50 Midterm I 100 points total Signature for Honor Code ________________________________ Part I Multiple Choice (14 points; 2 each) 1. Meiosis includes how many rounds of division? A) 0 B) 1 C) 2 D) 4 E) 3 2. In G1 of interphase, each chromosome in a diploid cell is present in how many copies? A) one B) two C) three D) four E) eight 3. In an organism with 3 pairs of homologous chromosomes how many molecules (strands) of DNA are present in each cell during G1 of interphase? A) 3 B) 6 C) 12 D) 24 E) 2 4. In an organism with 3 pairs of homologous chromosomes how many telomeres are present at metaphase I of meiosis? A) 6 B) 3 C) 12 D) 24 E) 48 5. Homologous chromosomes pair during what stage of cell division? A) mitotic prophase B) meiotic prophase C) A & B D) neither A nor B 6. What fraction of gametes produced by a parent with the genotype a/a;B/b;c/c will contain only recessive alleles for all three loci? A) 1/4 B) 1/2 C) 1/16 D) 1/32 E) 1/3 7. Nonallelic noncomplementation would cause you to incorrectly assume that two mutations are? A) in the same gene B) in different genes C) dominant D) recessive E) epistatic - 1 -
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Name ______________________________ Student ID # ________________________ Bio 50 Midterm I 100 points total 8. (10 points) In seahorses red color (R) is dominant to yellow color (r). You make the following crosses with seahorses of unknown genotype and recover the following progeny. Give the most probable genotype for each parent. If more than one genotype is possible list them all. PROGENY PARENTS red yellow PARENTAL GENOTYPES red X red 229 76 Rr X Rr red X yellow 148 153 Rr X rr yellow X yellow 0 304 rr X rr red X red 298 0 RR X Rr or RR X RR red X yellow 302 0 RR X rr 9. (14 points total) You are studying two traits in ring-tailed lemurs: tail length and coat
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This note was uploaded on 03/21/2008 for the course BIOL 202 taught by Professor Kieber-hogan during the Spring '08 term at UNC.

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Midterm I - Key - Name Student ID Bio 50 Midterm I 100...

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