Which of the following statements is true?
A) Sister chromatid exchange would lead to a reshuffling of alleles.
B) Exchanges occur between homologous chromosomes, but never between sister chromatids.
C) Crossing over has a cytological basis.
D) Sister chromatid exchange would mutate one strand of DNA.
E) Harlequin chromosomes are a result of homologous recombination.
Answer: C
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a. attract pollinators. b. develop into an embryo. c. discourage animals from eating the plant. d. store starch and oils
Which event cannot be determined by looking at the annual rings of a tree? a. Evidence of fires b. All can be determined by looking at the annual rings of a tree
c. Evidence of pests in the community d. Age of the tree e. Evidence of diseases in the community
Friedrich Miescher is credited with _____
a. proposing DNA as the hereditary material b. finding that proteins are the physical basis of inheritance c. defining the laws of inheritance d. being the first person to describe and extract DNA e. determining that proteins are composed of unlimited combinations of twenty amino acids
Imagine a population of monkeys in South America whose habitat has been reduced to the point where only 20 individuals survive. This is an example of
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