Smell and taste receptors would be classified as ____
a. photoreceptors
b. chemoreceptors
c. mechanoreceptors
d. thermoreceptors
e. nociceptors
ANSWER: b
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Distinguish between the structure of a duplicated chromosome before mitosis and the chromosome produced by separation of two chromatids during mitosis.
What will be an ideal response?
Answer questions 120–124 in reference to the five items listed
below. a. 12 b. 23 c. 24 d. 46 e. 47 D 120. How many chromosomes does each somatic cell have in a human male who has two X chromosomes? D 121. Following a gene duplication event involving only five loci, how many chromosomes will a human female have? D 122. How many chromosomes are present in the somatic cells of a child born with Down syndrome (trisomy 21)? D 123. How many chromosomes are present in each cell of the germ cell line for a tetraploid species where its normal complement of chromosomes is 48? D 124. The normal sperm cell of species X carries 11 chromosomes. Following nondisjunction in the formation of secondary spermatocytes and their subsequent fertilization of normal ova, some of the zygotes will have 21 chromosomes, others will have 22, and the remainder will have how many chromosomes?
Huntington disease is _____
a. a model of a multifactorial trait, controlled by several genes b. inherited as an X-linked dominant trait c. a disease with onset in early childhood d. one that produces no significant changes in brain cells e. a model of a single gene defect affecting behavior
Focal infections initially start out as
A) sepsis. B) bacteremia. C) local infections. D) septicemia. E) systemic infections.