If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of
your having only one allele for the disorder are
a. 1/4.
b. 1/2.
c. 3/4.
d. 1.
e. 0.
E
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Control of gene expression
_____ allows bacteria to adapt to changing environments. _____ is critical for development in multicellular organisms. _____ allows bacteria to replicate without control. _____ allows multicellular organisms to maintain homeostasis. _____ it stops multicellular organisms functioning as a whole.
Which of the following will result in an increase in population?
a. birth rates lower than death rates b. birth rates and death rates equal c. birth rates higher than death rates d. no birth rate and stable death rate
The introduction of a small population onto an island that results in a limited gene pool for a population best describes
a. the Hardy-Weinberg law. b. genetic drift. c. the bottleneck effect. d. the founder effect. e. the effect of genetic isolation.
A human zygote contains 46 chromosomes.
Answer the following statement true (T) or false (F)