Bio Exam #3

Tasmanian devils have 2n = 14 chromosomes. How many chromatids are in a single cell at anaphase of mitosis? A. 7 B. 14 C. 21 D. 28

D. 28

Tasmanian devils have 2n = 14 chromosomes. How many chromatids are in a single cell at metaphase of mitosis? A. 7 B. 14 C. 21 D. 28

D. 28

Tasmanian devils have 2n = 14 chromosomes. How many chromosomes are in a single cell at anaphase of mitosis? A. 7 B. 14 C. 21 D. 28

D. 28

How many chromosomes will there be in the resulting gametes when meiosis is complete? A. 2 B. 4 C. 6 D. 8 E. 16

D. 8

Trisomy 21 is an example of: A. Haploidy B. Diploidy C. Triploidy D. Aneuploidy E. Polyploidy

D. Aneuploidy

Cells produced during meiosis are: A. Haploid B. Diploid C. Polyploid D. Half the ploidy of the parental cell E. The same ploidy as the parental cell

D. Half the ploidy of the parental cell

Tasmanian devils have 2n = 14chromosomes. How many chromosomesare in a single cell at metaphase of mitosis? A. 7 B. 14 C. 21 D. 28

B. 14

Cotton is tetraploid (4n=52). After a cotton plant goes through meiosis, how many chromosomes does the pollen grain have? A. 13 B. 26 C. 52 D. 104

B. 26

Some daylilies are tetraploid, 4n= 44. What is the ploidy of their pollen? A. n = 11 B. 2n = 22 C. 2n = 11 D. n = 22 E. 4n = 22

B. 2n=22

How many chromosomes will there be in the resulting gametes when meiosis is complete?(8 chromosomes) A. 2 B. 4 C. 6 D. 8 E. 16

B. 4

How many PAIRS of homologous chromosomes are there in a gamete produced from a 2n=16 organism? A. 0 B. 2 C. 4 D. 8 E. 16

A. 0

What is degeneracy? A. Different mRNA codons can result in the same AA B. One tRNA can carry many different AAs C. The same tRNA can match multiple different mRNA codons D. mRNA codons are degrading with regard to tRNA specificity

A. Different mRNA codons can result in the same AA

Which of the following mutations is likely to have the least phenotypic effect? A. Silent/synonymous B. Missense/nonsynonymous C. Nonsense D. Frameshift

A. Silent/synonymous

Homologous chromosomes are: A. Similar but non-identical, one inherited from each parent B. Identical, resulting from DNA replication during S phase C. Identical, resulting from DNA replication during mitosis D. Similar but non-identical, differing between the two daughter cells following mitosis

A. Similar but non-identical, one inherited from each parent

How are microfilaments involved in mitosis or cytokinesis? A. They form the contractile ring that splits the cytoplasm during cytokinesis B. They attach to the kinetochores to move chromosomes around the cellC. They form the kinetochores that the spindle fibers connect toD. They form the centromere that connects the two sister chromatids of each chromosome

A. They form the contractile ring that splits the cytoplasm during cytokinesis

Which of the following is a synonymous mutation? A. UGU ➞ UGC B. UGU ➞ UGA C. UGU ➞ UGG

A. UGU ➞ UGC

Which best describes this cell? A. Anaphase of mitosis B. Anaphase of meiosis I C. Anaphase of meiosis II D. None of these

B. Anaphase of meiosis I

Sister chromatids are: A. Similar but non-identical, one inherited from each parent B. Identical, resulting from DNA replication during S phase C. Identical, resulting from DNA replication during mitosis D. Similar but non-identical, differing between the two daughter cells following mitosis

B. Identical, resulting from DNA replication during S phase

Dynamic Instability is: A. The ability of microtubules and microfilaments to quickly change thickness B. The ability of microtubules and microfilaments to quickly change length C. The ability of microtubules and microfilaments to quickly change +/- polarity D. Potentially a cool name fora band

B. The ability of microtubules and microfilaments to quickly change length

How are microtubules involved in mitosis or cytokinesis? A. They form the contractile ring that splits the cytoplasm during cytokinesis B. They attach to the kinetochores to move chromosomes around the cell C. They form the kinetochores that the spindle fibers connect to D. They form the centromere that connects the two sister chromatids of each chromosome

B. They attach to the kinetochores to move chromosomes around the cell

Which of the following is a nonsense mutation? A. UGU ➞ UGC B. UGU ➞ UGA C. UGU ➞ UGG

B. UGU ➞ UGA

Which best describes this cell in metaphase? A. 2n = 8 parent, meiosis I B. 2n = 8 parent, meiosis II C. 4n = 16 parent, meiosis II D. 2n = 16 parent, mitosis E. 4n = 8 parent, meiosis II

C. 4n=16 parent, meiosis II

Microtubules and microfilaments play important roles in ___ and ___, respectively. A. Cytokinesis; cytokinesis B. Cytokinesis; mitosis C. Mitosis; cytokinesis D. S phase; cytokinesis E. Mitosis; S phase

C. Mitosis; cytokinesis

Which of these alleles is dominant? A. B B. W C. They're incompletely dominant D. They're codominant

C. They're incompletely dominant

Which of the following chromosomal mutations differentiate humans and chimps? A. Duplications B. Deletions C. Inversions D. Translocations E. More than one of the other answers F. None of the other answers

E. More than one of the other answers