Homologous pairs of chromosomes are lined up independently of other such pairs
during _____.
A. metaphase II
B. anaphase I
C. metaphase I
D. prophase II
E. telophase II
C. metaphase I
Crossing over, resulting in an increase in genetic variation, occurs between _____.
A. nonsister chromatids of nonhomologous chromosomes
B. sister chromatids of nonhomologous chromosomes
C. nonsister chromatids of homologous chromosomes
D. sex cells and somatic cells
E. sister chromatids of homologous chromosomes
C
In human gamete production there is an average of _____ crossover events per
chromosome pair.
A. 2-3
B. 9-10
C. 5-6
D. 0-1
E. 10+
A. 2-3
Which of these gametes contain one or more recombinant chromosomes?
1. B, C, and G
2. B, C, F, and G
3. C, D, E, F, and G
4. A, B, and C
5. B, C, D, and G
2. B, C, F, and G
Different finch species have beaks of different shapes and sizes. What do these
beak differences tell us?
A. Different finch beak shapes are evidence that finch species adapted to different
environments over many generations.
B. Different finch beak shapes are evidence that several finch species with different
beak types came to the Galápagos Islands from the mainland.
C. Different finch beak shapes are evidence that all Galápagos finches share a
common ancestor.
D. Different finch beak shapes are evidence that individual birds changed their beaks
so that they could feed efficiently.
A
Genetic evidence supports which of the following explanations for the presence of 13
different finch species on the Galápagos islands?
Biology 1081Mastering Biology Chapter 231.Which of these individuals is a homozygous genotype?
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2.All the genes in a population are that population’s?
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3.Genetic drift is a process based on _____
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4.A mutation occurs when __________
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5.Every few years a giant axe chops off the head of every person who is over 6 feet tall.How willthis affect the human population?
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6.Modern travel along with migration reduces the probability of ______ having an effect on theevolution of humans.
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7.The ease with which humans travel across the globe is likely to increase ________.
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8.Homologous pairs of chromosomes are lined up independently of other such pairs during _____.
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9.Crossing over, resulting in an increase in genetic variation, occurs between __________.
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10.In human gamete production there is an average of ______ crossover events per chromosomepair.
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11.Which of these gametes contain one or more recombinant chromosomes?
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12.This animation illustrates ______ as it occurs during _______