No two people are genetically identical, except for identical twins. The chief cause of genetic variation among human individuals is
A) new mutations that occurred in the preceding generation.
B) the reshuffling of alleles in sexual reproduction.
C) genetic drift due to the small size of the population.
D) geographic variation within the population.
E) environmental effects.
Ans: B) the reshuffling of alleles in sexual reproduction.
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The number of allele pairs that assort independently in an organism is generally much higher than the number of chromosome pairs. This phenomenon is due to
A. independent assortment. B. segregation. C. crossing over. D. sex-linkage. E. chromosome inactivation.
Select the example of genetics.
A) Studying how various members of a royal family are related B) Studying the shape and size of dinosaur fossils C) Studying how a disease gene is transmitted within a royal family D) Studying how the different organelles in a cell work
The structure that people typically refer to as a "mushroom" is technically called the ____
a. Basidiocarp b. Mycelium c. Ascocarp d. hyphal mass e. Zygospore
The cell membrane mix of lipids and proteins is referred to as a(n) ____
a. mixture b. compound c. suspension d. permeability e. mosaic