Hello, I need help answering number 40(INCLUDING SUB-PARTS) multiple choice questions. Pls and thank you! 40. A.) If all current mitochondrial DNA sequences in humans coalesce to one dated to 70,000 years ago, then: a) this mitochondrial Eve was the only female living 70,000 ago b) this mitochondrial DNA lineage is the only one persisting to the present time c) this mitochondrial Eve can be matched to a single male who lived 70,000 years ago (Y-chromosome Adam) d) mitochondrial DNA diversity 70,000 years ago was definitely higher than that present now B.) If the climate is warming faster than at any time in the last 800,000 years or more, then: a) strong directional selection for adaptations that allow survival and reproduction in a warmer world will be present b) sufficient additive genetic variance will be present to allow rapid adaptation to a warmer world c) mutation rates will increase to cause more adaptive mutations d) mutation rates will decrease due to the effect of heat on cells C.) Evidence for evolution via natural selection includes: a) different phenotypes in a parthenogenetic species that consists of a single clone b) vestigial traits such as the short wings of a Guam rail (koko bird) c) optimal traits that are as good as an engineer could design d) changes in the phenotype in a population where the heritability of that trait is zero.
Hello, I need help answering number 40(INCLUDING SUB-PARTS) multiple choice questions. Pls and thank you!
40. A.) If all current mitochondrial DNA sequences in humans coalesce to one dated to 70,000 years ago, then:
a) this mitochondrial Eve was the only female living 70,000 ago
b) this mitochondrial DNA lineage is the only one persisting to the present time
c) this mitochondrial Eve can be matched to a single male who lived 70,000 years ago (Y-chromosome Adam)
d) mitochondrial DNA diversity 70,000 years ago was definitely higher than that present now
B.) If the climate is warming faster than at any time in the last 800,000 years or more, then:
a) strong directional selection for adaptations that allow survival and reproduction in a warmer world will be present
b) sufficient additive genetic variance will be present to allow rapid adaptation to a warmer world
c) mutation rates will increase to cause more adaptive mutations
d) mutation rates will decrease due to the effect of heat on cells
C.) Evidence for evolution via natural selection includes:
a) different
b) vestigial traits such as the short wings of a Guam rail (koko bird)
c) optimal traits that are as good as an engineer could design
d) changes in the phenotype in a population where the heritability of that trait is zero.
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