A certain disorder appears to be inherited from mother to child. What are two possible modes of
inheritance for this disorder?
What will be an ideal response?
This could be maternal inheritance, the disorder being caused by a mutation in the mitochondrial
DNA. This could also be a disorder related to epigenetics, where the paternal copy of a gene is
inactivated so the only active copy is the maternal copy which, if mutated, would cause the disorder.
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Which of the following contain enzymes used in the
breakdown of glucose and generation of ATP? a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. endoplasmic reticula
Which of the following is NOT considered to be well-accepted evidence related to human evolution?
A. Several species of Australopithecus and Paranthropus are known from early hominid fossils. They were herbivores and walked upright. Their fossils are only found in Africa. B. Only a single species of the genus Homo became prominent in Africa and appeared to have made a change from a primarily herbivorous diet to a carnivorous diet. C. Fossils of Homo erectus are found throughout Africa, Europe, and Asia, but not in Australia or the Americas. D. Based on fossil evidence it appears that the climate of Africa was becoming drier during the time that hominid evolution was occurring.
When is preimplantation diagnosis performed?
a. before in vitro fertilization takes place b. when the embryo has at least 100 cells c. when the embryo is at the 8 cell stage d. when the embryo becomes a fetus at 8 weeks e. shortly after birth
The Euphorbia of desert parts of Africa and India are succulent and have thorns but are superficially very similar to the unrelated cacti native to the deserts of the Americas. This pair of plant groups represents an example of ________
A) convergent evolution B) apostatic selection C) homology D) divergent evolution