The fewest number of individuals necessary to ensure the long term survival of a population is known as the
A) carrying capacity.
B) resource population.
C) lowest common denominator.
D) minimum viable population.
D
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In corn, having ligules (L) is dominant to liguleless (l), and green leaves (G) is dominant to white leaves (g). If a pure-breeding liguleless plant with green leaves is crossed to pure-breeding plant with ligules and white leaves, predict the proportion of F2 progeny with the genotype Ll gg.
A) 1/16 B) 1/8 C) 1/4 D) 1/2 E) Cannot be determined
During Mendel’s lifetime, most people believed that
a. all genetic traits bred true. b. only certain forms of domesticated plants and animals bred true. c. the characteristics of parents were blended in the offspring. d. the mother contributed all the hereditary material for the new generation. e. the father contributed all the hereditary material for the new generation.
In the formation of nucleosomes, one histone class, H1, is not directly involved, yet it does associate with DNA to form higher-level chromosomal structures. Where does this histone (H1 ) associate?
What will be an ideal response?
What is the original source of variation that natural selection can act upon?
A) Mutation B) Gene flow C) Genetic drift D) All of the above