Burkitt's lymphoma is a cancer of the lymphatic system. The endemic variant, common to equatorial Africa, commonly affects children who are also affected by chronic malaria
A recent study found that individuals with AA hemoglobin were twice as likely to develop Burkitt's lymphoma as those with the AS genotype. We saw a similar benefit of certain genotypes in cases of sickle cell disease. Recall that individuals who are ?A?S, ?A?C, or ?A?E have a survival and reproductive advantage over individuals who are homozygous ?A?A (and therefore succumb more easily to malaria) and over those who are homozygous for the mutant alleles (and therefore suffer from hereditary anemia). Resistance to malaria and Burkitt's lymphoma are both an example of ________ advantage. Fill in the blank(s) with correct word
heterozygous
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The pre-natal period begins with the ____
a. zygote b. blastocyst c. embryo d. fetus e. infant
Bipedalism is most highly developed in
a. hominoids. b. apes. c. humans. d. monkeys. e. prosimians.
NASA Scientists send a small population of dogs to a new planet in order to test if it will be hospitable for human colonization. Through a random lottery, only Great Dane and St. Bernard dog breeds are sent, and the resulting population consists of tall, longhaired dogs. After 100 years these dogs return to Earth and are no longer able to mate with Earth dogs. This scenario is an example of
A. sympatric speciation through genetic drift. B. sympatric speciation through natural selection. C. allopatric speciation through genetic drift. D. allopatric speciation through natural selection.
Methods for determining the linkage group and genetic map in humans involve which of the following?
A) chiasma-type and classical analyses B) DNA markers C) twin spots and tetrad analysis D) zygotene and pachytene DNA syntheses E) tetrad analysis and bromodeoxyuridine