Question 60 What are oncogenes? specific to males mutated variants of genes that code for cell division tumor suppressor genes genes that code for proteins which stop the cell cycle Question 61 Homologous chromosomes undergo recombination during prophase II. metaphase I. metaphase II. both prophase I and II. prophase I.
Question 60
What are oncogenes?
specific to males
mutated variants of genes that code for cell division
tumor suppressor genes
genes that code for proteins which stop the cell cycle
Question 61
Homologous chromosomes undergo recombination during
prophase II.
metaphase I.
metaphase II.
both prophase I and II.
prophase I.
Question 62
List three alterations that occur before mRNA leaves the nucleus for translation.
Question 63
Webbing of digits (fingers) in humans, or syndactyly, typically occurs during the sixth to eighth weeks of embryonic life. One of every 2000–2500 births have syndactyly, and it is more common among Caucasian males. Syndactyly is caused by the failure of what process?
cell division
mitosis
cytokinesis
apoptosis
Question 64
Arrange the following structures in order from smallest to largest?
Gene, chromosome, genome,
Question 65
Which of the following is FALSE about telomeres?
telomeres are repeats of a specific DNA sequence
telomeres shorten with each cell division
telomeres produce telomerase
telomeres are the cellular "clock" of the cell
Question 66
An insect has a total number of 16 chromosomes. Thus, its diploid number is ____ and the haploid number is ____.
Question 67
Which of the following reproduce asexually?
bacteria
some protists
archaea
single-celled organisms
All of the above are correct.
Question 68
Sister chromatids are best described as two chromosomes having
the same genes in the same order but having different alleles.
the same alleles of the same genes in a different order.
different genes in the same order and possibly having different alleles of some genes.
different alleles of the same genes arranged in a different order.
an identical DNA sequence.
Question 69
During what phase of meiosis do the homologous pairs of chromosomes line-up in the middle of the cell with the help of spindle fibers?
Telophase I
Anaphase I
Metaphase I
Prophase I
Question 70
A mutation in the tumor suppressor gene p53 prevents the protein from functioning normally. What is most likely to occur as a result of this mutation?
growth and replication of damaged cells
apoptosis
normal cells will undergo additional mutation
growth of cells with repaired DNA
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