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 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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