Which of these statements is false?
A) In humans, each of the 22 maternal autosomes has a homologous paternal chromosome.
B) In humans, the 23rd pair, the sex chromosomes, determines whether the person is female (XX) or male (XY).
C) Single, haploid (n) sets of chromosomes in ovum and sperm unite during fertilization, forming a diploid (2n), single-celled zygote.
D) At sexual maturity, ovaries and testes produce diploid gametes by meiosis.
E) Sexual life cycles differ with respect to the relative timing of meiosis and fertilization.
Ans: D) At sexual maturity, ovaries and testes produce diploid gametes by meiosis.
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The Earth formed approximately
(a) 4600 years ago. (b) 1 million years ago. (c) 1 billion years ago. (d) 4.6 billion years ago.
The process that excretes undigested and unabsorbed residues is
a. absorption. b. assimilation. c. secretion. d. digestion. e. elimination.
The ________ is the temperature at which atmospheric water condenses
Fill in the blank(s) with correct word
In a paternity case, bands from DNA fingerprinting that are common to both the biological mother and the child are identified and eliminated from further consideration. If the remaining bands can be matched to the presumed father,
A. it is extremely likely that he is the father. B. it is extremely unlikely that he is the father. C. there is no doubt, he is the father. D. DNA fingerprinting cannot be used to determine paternity.