How does crossing over increase genetic diversity?
A) Crossing over increases the different combinations of genes present in a gamete.
B) Crossing over allows specific genes to travel together on one chromosome.
C) Crossing over increases the incidence of mutations in genes.
D) Crossing over prevents the inheritance of harmful mutations.
A
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Molecular data has shown that ____ originated during the period when non-bryophytes diverged from the bryophytes
a. auxins b. cytokinins c. jasmonates d. gibberellins
e. ethyleneA red, round, true-breeding tomato is bred with a yellow, oval, true-breeding tomato, and the F1s are testcrossed to a homozygous-recessive tester. This results in the offspring below
Calculate the chi-squared value to test the likelihood of linkage. yellow oval 11 red round 14 yellow round 7 red oval 8
Effects that are dependent on the size of the population and regulate the growth of populations are called ________ effects.
A. density-independent B. demographic C. density-dependent D. K-related E. environmental resistance
Cancer cells are different from other cells in that they have lost their "contact inhibition." Contact inhibition means:
A) most cells don't begin to divide until they bump up against other cells or collections of cells. B) DNA replication in most cells stops when the double helix comes in contact with particular enzymes. C) most cells stop dividing when they bump up against other cells or collections of cells. D) DNA replication in most cells doesn't begin until the double helix comes in contact with particular enzymes. E) most cells stop dividing when they have reached 50 cell divisions.