Hemophilia is a sex-linked, recessive genetic disorder. If a woman who was a carrier for hemophilia married a man who had the disorder, which of the following is not true?
A. Female children would have a 50% chance of being hemophiliac.
B. Male children would have a 50% chance of being hemophiliac.
C. All male children would be hemophiliac.
D. Female children would either have the disorder or be a carrier for the disorder.
Answer: C
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The bones in the forelimbs of a mammal
a. can often be traced to a common ancestor. b. offer no evidence to support the theory of evolution. c. perform the same function no matter which species they are in. d. may exhibit either analogy or homology but not both when compared to the forelimb of another animal. e. show convergence with some invertebrate structures.
If you touch a hot stove and burn your hand, the pain isn't actually in your hand-it's in your head. What evidence can you provide to substantiate this claim?
A. Interneurons form connections directly from the burned receptor molecules to the brain. B. Motor neurons pull your hand away from the flame, signaling pain to the brain. C. Sensory neurons and interneurons carry the heat sensation to the brain where it is interpreted as painful. D. A reflex arc allows the quick response between the hand and the brain; no interpretation occurs.
The sperm and its DNA enters the egg through simple diffusion through the egg plasma membrane.
Answer the following statement true (T) or false (F)
Mitochondrial targeting presequences usually consist of a
a. hydrophobic helix. b. hydrophobic random chain. c. negatively charged helix. d. positively charged helix.