A cross between two purple flowers that are heterozygous for their traits is an example of a ________
a. monohybrid cross
b. dihybrid cross
c. Punnett square
d. test cross
e. None of these choices.
a
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What is the function of the ? subunit of E. coli RNA polymerase in transcription?
A. It contains the polymerase active site. B. It contains the separate exonuclease site required for proofreading. C. It directs the polymerase to bind a specific type of promoter sequence. D. It signals the polymerase to terminate transcription at specific sites. E. It allows template-independent RNA synthesis.
The probability of a couple having either a boy or a girl is ½. However, many families have more boys than girls and VICE VERSA. Why is the observed ratio of boys to girls in typical families different than the predicted ratio?
A. There is a large random sampling error due to the small size of families. B. There is a small random sampling error due to the small size of families. C. Humans are more heterozygous than is predicted by random sampling. D. The sex of each child is determined independently. E. Two of the answers are correct. There is a large random sampling error due to the small size of human families and the sex of each child is determined independently.
Fibrous connective tissue repair is defined as:
a. scar formation b. primary union c. regeneration d. mitotic cellular repair
These are the cheekbones of the face.
What will be an ideal response?