Exam 3 Review Flashcards
What is a genome?
a) The complete complement of an organism’s genes
b) A specific set of polypeptides within each cell
c) Specialized polymer of four different kinds of monomers
d) A specific segment of DNA that’s found within a prokaryotic chromosome
e) An ordered display of chromosomes arranged from largest to smallest
a) The complete complement of an organism’s genes
Meiosis can occur…
a) In all organisms
b) Only in diploid organisms
c) Only in multicellular organisms
d) Only in haploid organisms
e) Only in unicellular organisms
b) Only in diploid organisms
The following graph shows changing DNA content in a eukaryotic cell during meiosis. Which of the following stages represent haploid cells?
a) Z
b) Y
c) X
d) W and Y
e) Y and Z
e) Y and Z
When the two haploid gametes contain two different alleles of a given gene, the resulting offspring is called…
a) discrete
b) haploid
c) heterozygous
d) homozygous
e) a fused allele
c) heterozygous
If you cross a centaur with a mermaid what is the probability that the offspring would be human?
a) 0%
b) 10%
c) 25%
d) 50%
e) 100%
c) 25%
What event during meiosis, is responsible for Mendel’s law of segregation?
a) Crossing over
b) Synapsis
c) Cytokinesis
d) Reduction of chromosomes number by half
e) Nondysfunction
d) Reduction of chromosomes number by half
What would be the phenotype ratio if the characters Mendel followed in dihybrid cross were on the same chromosome?
a) 9:3:3:1
b) 3:1
b) 3:1
How many different types of gametes can be formed by plants with a genotype PpYYrrTt?
a) 16
b) 12
c) 8
d) 4
e) 2
d) 4
Genes that are inherited together are said to be…
a) Homozygous
b) Heterozygous
c) Epistatic
d) Polyzygous
e) Linked
e) Linked
In tigers, a recessive allele causes an absence of fur pigmentation (white tiger) and crossed eyes. If two phenotypically normal tigers that are heterozygous at the locus are mated, what percentage of cross-eyed tigers will be white?
a) 0%
b) 10%
c) 25%
d) 50%
e) 100%
e) 100%
In a mating experiment using drosophila melanogaster (fruit flies)a cross was made between homozygous wild-type (grey) females and mutant (yellow) males. All of the resulting F1 offspring were grey. however when F1 offspring were mated with each the F2 gen had the characteristics shown below
-Is the mutant allele for yellow body color?
-Is the gene for body color autosomal in X-linked?
a) Recessive, X-linked
b) Recessive, autosomal
c) Dominant, x linked
d) Dominant, autosomal
e) None
a) Recessive, X-linked
The frequency of Down syndrome in the human population is most closely correlated with which of the following?
a) Frequency of new meiosis
b) Average of the ages or mother and father
c) Age of the mother
d) Age of father
e) Exposure if pregnant women to environmental pollutants
c) Age of the mother
If DNA is made up of 12% adenine, what is the percentage of guanine
a) 12
b) 24
c) 38
d) 48
e) 76
c) 38
A pet shop owner gets a shipment of salamanders that are brown with little gold spots. When he breed them, 25% of the F1 offspring are solid brown, 50% are brown with gold spots, and 25%are solid gold. If he wants to produce ONLY gold-spotted babies for his customers, what should he do?
a) Breed two brown salamanders together
b) Breed two gold spots salamanders
c) Breed a gold spotted salamander to a solid gold salamander
d) Breed brown salamander to gold salamander
e) Breed two gold salamanders together
d) Breed brown salamander to gold salamander
WOTF enzymes would catalyze the formation of the bond between monomer diagram…
RNA polymerase
