Cells contain twice the normal number of independent chromosomes briefly during
A) prophase.
B) metaphase.
C) anaphase.
D) telophase.
C) anaphase.
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Transcribed DNA sequences that are removed during mRNA processing are called _____________________
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Consider the following genetic study involving two autosomal genes. One of these, eye colour, has the dominant allele (R) for red eye colour and the recessive allele (r) for yellow eye colour. The other has the dominant allele (T) leading to paws with thumbs, while the recessive allele (t) codes for paws without thumbs. Presuming no linkage between the genes, what should be the phenotype ratio of the offspring produced by a testcross (RrTt ? rrtt)?
a. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs b. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs c. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs d. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thum
Fill in the blanks to complete the following statements. ? ?A disease that is not active and remains dormant until conditions are favorable for it to reproduce again is going through a period of ________
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If you carve your initials in the trunk of a tree, will they move up as the tree grows?
A) Yes. A tree elongates from the ground up. B) Yes. Secondary growth will cause them to move up. C) No. Elongation occurs just below the tips of growing stems in the apical meristems. D) No. Secondary growth continues in all parts of a plant throughout its life.