Cancer does not typically follow a Mendelian pattern of inheritance because it is usually caused by
A) two gene variants, one dominant and one recessive, and no environmental input.
B) specific combinations of alleles and an environmental factor.
C) specific combinations of an environmental factor and one dominant gene variant.
D) genes that cause death before birth.
B) specific combinations of alleles and an environmental factor.
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New genes can evolve from all of the following except
a. gene duplication from unequal crossing over. b. gene duplication from replicating transposable elements. c. gene duplication from crossing over. d. exon shuffling. e. combining parts of two or more genes.
Blue light has energy than red light and is by a green leaf.
A. less; absorbed B. more; absorbed C. more; reflected D. less; reflected E. equal; reflected
Which of the following is the ultimate source of chemical energy for all living organisms?
a. glucose b. photosynthesis c. GTP d. cellular respiration
The enzyme responsible for separating the DNA strands during DNA replication is (topoisomerase/primase/helicase)
What will be an ideal response?