EBK HUMAN BIOLOGY
11th Edition
ISBN: 8220100545931
Author: MCMILLAN
Publisher: Cengage Learning US
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Chapter 23, Problem 2SQ
The relative numbers of different genes (alleles) in a gene pool change as a result of four processes of microevolution: _________, _________, _________, and _________.
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Sixteen percent of a population is unable to taste the chemical PTC. These non-tasters are recessive for the tasting gene.
What percentage of individuals in the population are tasters? ______________
What is the frequency of the dominant and recessive allele? _____________________________
What percentage of the population are heterozygous for the trait? ___________________
Although humans and nematodes (round worms) have approximately the same number of coding genes, humans exhibit greater phenotypic complexity.
This illustrates the ______________________ paradox which can be partly explained by_______________________.
Group of answer choices
G value, differences in gene regulatory networks (e.g., # transcription factors)
C-value, cell size and transposable elements
G-value, cell size and transposable elements
C-value, differences in gene regulatory networks (e.g., # transcription factors)
Many genetic disorders, such as cystic fibrosis and sickle-cell disease are due to mutations in a recessive allele. You have sampled an isolated population in which you know that the percentage of the homozygous recessive genotype (aa) is 36%. Using that 36%, calculate:
1g. the frequency of the recessive phenotype if "A" is completely dominant over "a” (round to the nearest hundredth)
Chapter 23 Solutions
EBK HUMAN BIOLOGY
Ch. 23 - Prob. 1RQCh. 23 - As shown in Figure 23.25, there is considerable...Ch. 23 - Prob. 3RQCh. 23 - Prob. 4RQCh. 23 - Prob. 5RQCh. 23 - Prob. 6RQCh. 23 - Prob. 1SQCh. 23 - The relative numbers of different genes (alleles)...Ch. 23 - A difference in survival and reproduction among...Ch. 23 - The fossil record of evolution correlates with...
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