Kaplan sc435 – crossing over and the random distribution

Question

Question 1. 1. Crossing over and the random distribution of maternal and paternal chromosomes are responsible for

(Points : 1)

genetic stability.

cell division.

genetic variation.

DNA synthesis.

none of the above

Question 2. 2. A measurable or observable trait or characteristic of an organism is called a(n)

(Points : 1)

phenotype

genotype

allele

gene

Question 3. 3. A functional chromosome contains which of the following?

(Points : 1)

origin of replication

telomeres

centromeres

all of the above

Question 4. 4. Errors in chromosome separation are rarely a problem for an organism.

(Points : 1)

True

False

Question 5. 5. Genetics contribute to advances in:

(Points : 1)

agriculture.

pharmaceuticals.

medicine.

modern biology.

All of the above.

Question 6. 6. Bacteria and viruses can be used to study genes and inheritance, even though they are structurally and metabolically different from animal and plant cells.

(Points : 1)

True

False

Question 7. 7. The function(s) of a DNA repair gene is studied by the subdivision of genetics called:

(Points : 1)

population genetics.

transmission genetics.

molecular genetics.

Question 8. 8. Sister chromatids separate and move toward opposite poles during which phase of mitosis?

(Points : 1)

prophase

pro-metaphase

metaphase

anaphase

telophase

Question 9. 9. If a typical somatic cell has 32 chromosomes, how many chromosomes are expected in each gamete of that organism?

(Points : 1)

46

64

0

16

32

Question 10. 10. Progression through the different phases of the cell cycle is regulated by key transition points called checkpoints.

(Points : 1)

True

False

Question 11. 11. Crossing over usually occurs during

(Points : 1)

meiosis I.

meiosis II.

mitosis.

S-phase.

Crossing over occurs randomly in all division types.

Question 12. 12. Genetic information can be carried in which of the following biomolecules?

(Points : 1)

proteins

DNA and not RNA

RNA and not DNA

Either DNA or RNA

Question 13. 13. A eukaryotic cell in G1 has a mutation that prevents cyclin B from being made. At which cell cycle stage would this cell stop?

(Points : 1)

G1

S

G2

M (anaphase)

M (telophase)

Question 14. 14. Which stage of meiosis increases genetic variability in the gamete cells?

(Points : 1)

telophase

prophase I

anaphase I

anaphase II

Question 15. 15. Evolution cannot occur without genetic changes in populations.

(Points : 1)

True

False

Question 16. 16. Which of the following is not a component within a single nucleotide of a nucleic acid?

(Points : 1)

nitrogenous base

sugar

polymerase

phosphate

Question 17. 17. The complete genetic makeup of any organism is its

(Points : 1)

genotype

genome

proteome

DNA

Question 18. 18. A form of a gene that has a slightly different sequence than other forms of the same gene but encodes the same type of a protein is called a(n)

(Points : 1)

phenotype

genotype

allele

gene

Question 19. 19. In which part of the cell cycle is DNA replicated?

(Points : 1)

G1

G2

S

M

DNA is replicated before the cell cycle.

Question 20. 20. Permanent, heritable changes in genetic information (DNA) are called

(Points : 1)

mutations

genes

alleles

genome

 

 

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