Various forms of the same gene are called ____
a. genotypes
b. alleles
c. somatic
d. recessive
e. phenotypes
ANSWER: b
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Which one of the following sequences is most likely to form a hairpin with a 5 nucleotide loop?
A. TTTTAGACTGAAATAGTCTTTTT B. TACGAAATACGGGATTTA C. AAAAAAAATTTTTTT D. CCCGGGAAAAAAAAACCCGGG E. ACATACAGACCCAATTGACATAG
Which benefit, derived from biodiversity, would be categorized as an ecosystem service?
a. the anticancer drug Taxol, derived from the yew tree b. plants and fruits that are edible by humans c. cotton and other useful plant-derived fibers d. decomposition of wastes e. wild organisms as a source of genes for genetic engineering
When two lines stem from a single branch point on a phylogenetic tree, what are they called?
a. branch points b. leaves c. sister taxa d. species
If a parent cell has 16 chromosomes and undergoes meiosis, each of the resulting cells will have how
many chromosomes? a. 64 b. 32 c. 16 d. 8 e. 4