The logic behind sequential polar body analysis is based on
A) Darwin's theory of natural selection.
B) Mendel's law of segregation.
C) Mendel's law of independent assortment.
D) the rules of the genetic code.
B) Mendel's law of segregation.
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In pea plants flowers are either white or purple; the purple color is produced by pigments called anthocyanins. The production of anthocyanins is a two-step process; the first is controlled by the C gene and the second by the P gene
Both genes must produce functional proteins for anthocyanin to be produced. For each gene, the dominant (C and P) alleles produce functional proteins. Which of the following genotypes will produce white (no pigment) flowers? A. ccPP B. CcPP C. CCpp D. ccPP and CcPP E. ccPP and CCpp
Which of the following is not a role for methylation?
A. Methylation can protect bacterial RNA from restriction enzymes that are used to destroy viral DNA. B. Methylation of DNA can act as an inhibitor of gene expression. C. Methylation of DNA can enhance binding of certain proteins. D. Methylation is important in directing mismatch repair to repair the correct DNA strand. E. Methylation in eukaryotes can affect the formation of Z-DNA.
The sucker of clingfishes is modified from:
a. the mouth. b. the pectoral fins. c. a disc on top of the head. d. the pelvic fins. e. the first dorsal fin.
Which hormone causes lengthening in plants by stimulating cell division and elongation along the long axis of stems and other organs?
a. auxin b. cytokinin c. ethylene d. gibberellin e. abscisic acid