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|
Click on the diagram to start the animation. What process is illustrated by this animation? (Activity 23A)
|
| natural selection |
| nonrandom mating |
| mutation |
| stabilizing selection |
| gene flow |
|
|
|
Click on the diagram to start the animation. What process is illustrated by this animation? (Activity 23A)
|
| natural selection |
| nonrandom mating |
| mutation |
| migration |
| gene flow |
|
|
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Generation to generation change in the allele frequencies in a population is _____. (Activity 23A)
|
| microevolution |
| genetic drift |
| natural selection |
| mutation |
| macroevolution |
|
|
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Which of these individuals is a homozygous genotype? (Activity 23B)
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| AA |
| Aa |
| Gg |
| AG |
| aG |
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All the genes in a population are that population's _____. (Activity 23B)
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| gene pool |
| fitness |
| genotype |
| Hardy-Weinberg |
| phenotype |
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Genetic drift is a process based on _____. (Activity 23B)
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| differential reproductive success correlated to the relationship between a phenotype and the environment |
| immigration |
| mutation |
| the role of chance |
| emigration |
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A mutation occurs when _____. (Activity 23B)
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| individuals leave a population |
| individuals enter a population |
| some individuals leave more offspring than other individuals |
| there is a change in the DNA sequence of a gene |
| population sizes are small |
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Every
few years a giant axe chops off the head of every person who is over 6 feet
tall. How will this affect the human population? (Activity 23B)
|
| Gene flow will increase. |
| Alleles that promote "tallness" will decrease in frequency. |
| Genetic drift will play less of a role in the evolution of humans. |
| It will increase in number since shorter people use fewer resources than taller people. |
| The mutation rate will increase. |
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Modern travel along with migration reduces the probability of _____ having an effect on the evolution of humans. (Activity 23B)
|
| gene flow |
| mutation |
| disease |
| genetic drift |
| natural selection |
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The ease with which humans travel across the globe is likely to increase _____. (Activity 23B)
|
| natural selection |
| gene flow |
| mutation |
| genetic drift |
| all of these |
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Homologous pairs of chromosomes are lined up independently of other such pairs during _____. (Activity 23B)
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| metaphase I |
| anaphase I |
| prophase II |
| metaphase II |
| telophase II |
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Crossing over, resulting in an increase in genetic variation, occurs between _____. (Activity 23B)
|
| sex cells and somatic cells |
| sister chromatids of homologous chromosomes |
| nonsister chromatids of homologous chromosomes |
| sister chromatids of nonhomologous chromosomes |
| nonsister chromatids of nonhomologous chromosomes |
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In human gamete production there is an average of _____ crossover events per chromosome pair. (Activity 23B)
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| 0–1 |
| 2–3 |
| 5–6 |
| 9–10 |
| 10+ |
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Click on the diagram to start the animation. Which of these gametes contain one or more recombinant chromosomes? (Activity 23B)
|
| A, B, and C |
| C, D, E, F, and G |
| B, C, and G |
| B, C, F, and G |
| B, C, D, and G |
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Click on the diagram to start the animation. This animation illustrates _____ as it occurs during _____. (Activity 23B)
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| centrosome separation ... anaphase II |
| cytokinesis ... telophase I |
| crossing over ... prophase I |
| random fertilization ... prophase I |
| karyokinesis ... prophase II |
