When a population goes through a bottleneck, genetic drift occurs in the large population of survivors of a severe
change in environment.
___________ Indicate whether the statement is true or false.
False - small
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Which of the following may be affected by altitude?
a. HDL and LDL b. white blood cell count c. red blood cell count d. weight e. urea
Which of the following is not a way transposons can benefit the host?
A. Some transposons contain antibiotic resistance genes. B. Some transposon sequences (Alu) are used as target sites for RNA editing. C. The antibody diversity mechanism has evolved from ancient cellular invasion by transposons. D. Movement of transposons can disrupt genes that control the cell cycle, giving the host cell a growth advantage over neighboring cells. E. If genes captured by transposons are duplicated, one copy may evolve and acquire new functions.
In the pine life cycle, the processes of pollination, fertilization, and seed formation typically take ____ to complete
a. a few days b. a few weeks c. a few months d. one year to five years e. six months to two years
Translocation occurs when:a
part of a chromosome breaks off and attaches to a nonhomologous chromosome. b. part of a chromosome breaks off and attaches to a homologous chromosome. c. crossing-over events occur. d. genes move from one area on a chromosome to another area on the same chromosome. e. a Y chromosome replaces an X chromosome in a female cell.