Generally, it is not possible to determine whether nondisjunction failed to occur in oogenesis or spermatogenesis. However, it is possible to assert that _________ resulted in nondisjunction in _________.
A. XXY; oogenesis
B. XYY; spermatogenesis
C. XXX; oogenesis
D. XXY; spermatogenesis
E. XO; oogenesis
Answer: B. XYY; spermatogenesis
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Witch hunts may have been set off by exposure to alkaloids produced by _____, which caused tremors, hallucinations, and illness
a. Candida albicans b. Epidermophyton floccosum c. Claviceps purpurea d. Histoplasma capsulatum
The Old Order Amish in Lancaster County is descended from one man and woman and has an unusually high
frequency of a recessive allele that causes Ellis-van Creveld syndrome. This is an example of ____.
a. a bottleneck b. mutation c. a founder effect d. gene flow e. genetic drift
Which of the following statements regarding cells is false?
A) All cells are enclosed in a membrane that maintains internal conditions different from the surroundings. B) All cells have a cell wall. C) All cells can interconvert forms of energy. D) All cells have DNA as their genetic material.
Which of the following globular proteins is used to form filaments as an intermediate step to assembly into hollow tubes?
(a) tubulin (b) actin (c) keratin (d) collagen