(a)
To determine:
Whether these concordances suggest that trait X is influenced by genetic factors.
Introduction:
Comparisons of monozygotic and dizygotic twins can be used to assess the importance of environmental and genetic factors in producing differences in a particular characteristic. If both members of a twin pair have a common trait, then they are said to be concordant and if only a single member of the pair has the trait then, then the twins are said to be discordant. Concordance is the percentage possessed by twin pairs that are concordant for a particular trait.
(b)
To determine:
Whether these concordances suggest that trait X is influenced by environmental factors.
Introduction:
Comparisons of monozygotic and dizygotic twins can be used to assess the importance of environmental and genetic factors in producing differences in a particular characteristic. If both members of a twin pair have a common trait, then they are said to be concordant and if only a single member of the pair has the trait then, then the twins are said to be discordant. Concordance is the percentage possessed by twin pairs that are concordant for a particular trait.
(c)
To determine:
Whether these concordances suggest that trait X is influenced by both genetic and environmental factors.
Introduction:
Comparisons of monozygotic and dizygotic twins can be used to assess the importance of environmental and genetic factors in producing differences in a particular characteristic. If both members of a twin pair have a common trait, then they are said to be concordant and if only a single member of the pair has the trait then, then the twins are said to be discordant. Concordance is the percentage possessed by twin pairs that are concordant for a particular trait.
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Chapter 6 Solutions
Genetics: A Conceptual Approach
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