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In studies of human MZ and DZ twin pairs of the same sex who are reared...

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Biology

In studies of human MZ and DZ twin pairs of the same sex who arereared together, the following concordance values are identifiedfor various traits. Based on the values shown, describe therelative importance of genes versus the influence of environmentalfactors for each trait.

Trait Concordance

MZ DZ

Blood type 100 65

Chicken pox 89 87

Manic depression 67 13

Schizophrenia 72 12

Diabetes 62 15

Cleft lip 51 6

Club foot 40 4

Answer & Explanation Solved by verified expert
3.7 Ratings (478 Votes)
Monozygotic twins or MZ are twins formed from a single zygote which splits to form two embryos They are phenotypically and genotypically similar but not exactly the same They have maximum genetic similarity Dizygotic twins are produced when two eggs in the ovary gets fertilized simultaneously by two sperms creating two zygotes which formes two embryos Dizygotic twins are nothing but normal siblings born together They do not have as much genetic similarity as MZ twins Concordance value indicates the    See Answer
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