1.At the end of anaphase of mitosis, there are 92 chromosomes in a human cell. T
ID: 267914 • Letter: 1
Question
1.At the end of anaphase of mitosis, there are 92 chromosomes in a human cell.
True
False
Mitosis
2. The two strands of each nucleotide chain in DNA are identical.
True
False
DNA structure
3._______ is known as "good cholesterol" because it helps to reduce the amount of "bad cholesterol" in the blood by returning it to the liver.
high-density lipoproteins
low-density lipoproteins
beta-blockers
angio suppressants
cholesterol metabolism
4.Twins are said to be concordant for a trait when:
Both twins exhibit the trait.
Only identical twins exhibit the trait.
Only fraternal twins exhibit the trait.
Fraternal twins more often show the trait than identical twins.
Twin studies
5. Variation in gene expression is due to the effects of other genes and the environment.
True
False
6. Gene expression
Consanguinous matings:
Increase heterozygousity
Increase homozygousity
Decrease homozygousity
Increase genetic variation in large populations
Population genetics
7. Erik and Heather are at the extremes of a phenotypic trait. Their offspring:
will favor one parent over the other
will have a 3:1 ratio
will appear to be an average of the two
will be bell-shaped
Continuous traits
8. Leptin is:
a hormone produced only by females
a signal from fat cells to the brain
a mutant hormone – not normally produced
a hormone produced only by males
Polygenic inheritance
9. A genetic disease involving long appendages and nearsightedness is:
Cystic Fibrosis
Porphyria
Marfan Syndrome
Muscular dystrophy
Modes of inheritance
10. Human inheritance doesn't necessarily follow Mendel's laws due to the presence of:
multiple alleles
non-nuclear DNA (mtDNA)
linked genes
All of the above
reasons for exceptions to Mendel's laws
11. A human trait that shows intermediate phenotypes with differing levels of LDL receptors is:
Familial hypercholesterolemia
Cystic fibrosis
PKU
Hemophilia
Incomplete dominance
12. An example of a codominant trait involves:
ABO blood typing
FH
Cystic fibrosis
Porphyria
Codominance
13. There are 9 of the 22 autosomes in which it matters the parental origin of the gene expressed. In order to ensure the correct allele is expressed (maternally vs. paternally), the other allele is shut off otherwise known as _____.
imprinted
phenocopied
denatured
mutated
imprinting
14. Turning off a gene can be achieved by:
Annotation
Phosphorylation
Methylation
Acetylation
Embryonic development
15. The onset of a genetic disorder at earlier ages with increasing severity in successive generations is known as:
Magnification
Penetrance
Transformation
Anticipation
Mutations
Polymerase chain reaction produces:
a southern blot
16. YAC’s
Multiple copies of DNA
Endonucleases
Genetic engineering
17. Addition or deletion of nucleotides in a DNA sequence is known as a:
Nonsense mutation
Missense mutation
Sense mutation
Frameshift mutation
Mutations
18. Compounds that are not mutagenic but can be converted into mutagens are known as:
Anti-oxidants
Isomeres
Aliphatic
Pro-mutagens
Mutations
19. Which of the following is a purine?
cytosine
guanine
thymine
uracil
purines
20. MicroRNAs bind to _______ in order to prevent _______.
mRNA; translation
mRNA; transcription
tRNA; translation
tRNA; transcription
microRNAs
Explanation / Answer
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