Genes that are located on the same chromosome and are close together:
A. always segregate from one another during
division.
B. may not assort independently of each
other.
C. are always located on autosomes.
D. are usually clustered on the Y
chromosome.
E. are never located on the X chromosome.
B
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Carotenoids are important to many plants because these pigments are able to
A. remove carbon dioxide from the air. B. absorb wavelengths of light that neither chlorophyll a nor b can absorb. C. absorb water so that hydrolysis can be carried out in the chloroplasts. D. capture UV radiation that is harmful to the DNA in the nucleus of plant cells. E. store electrons for use during the "dark" reaction of photosynthesis.
A pyrimidine or purine base that has been joined with a ribose or deoxyribose sugar moiety is now termed a ________.
Fill in the blank(s) with the appropriate word(s).
The wings of birds and the wings of bats represent
a. homologous structures. b. analogous structures. c. homoplastic structures. d. vestigial structures. e. structures that are homoplastic but with homologous components.
If two copies of a gene are identical alleles, the condition is referred to as ____
a. homozygous b. hybrid c. heterozygous d. codominant e. dominant