Autosomes represent ____
a. all chromosomes including the sex chromosomes
b. the half of the chromosomes inherited from one parent
c. all chromosomes other than the sex chromosomes
d. chromosome pairs with unlike members
e. those chromosomes found only in gametes
c
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Match the description with the type of spore.
A. Arthroconidia B. Blastoconidia C. Basidiospores D. Ascospores
Impressive was a champion Quarter Horse stallion with a magnificent muscular physique, a trait that he passed on to dozens of offspring. However, many of Impressive's offspring developed periodic muscular twitching that sometimes left the horses temporarily unable to move. Some horses even died. As it turns out, Impressive's award-winning physique was due to a mutation in a single, protein-encoding gene, resulting in hyperexcitable muscle (which contracts even in the absence of a stimulus from its motor neuron). Which is not a plausible explanation for the identity of the abnormal muscle protein in Impressive and his offspring?
A. Overactive troponin molecules B. Acetylcholine receptors that function in the absence of acetylcholine C. Tropomyosin that is unable to bind to actin D. Leaky Na+ channels E. Overactive Ca2+ pumps in the membrane of the sarcoplasmic reticulum
The letter “D” in the above figure represents
a. trigger zone. b. output zone. c. input zone. d. conducting zone. e. none of these.
Which of the following is characteristic of the developmental pattern referred to as mosaic
development? a. The cells of the adult are very different from each other. b. The fate of adult cells is predetermined in embryonic founder cells. c. Adult cells are richly interspersed with proteins. d. Embryonic cells have a wide range of possible developmental patterns. e. Embryos have a wide range of morphologies, but all look identical as adults.