Although identical twins share 100 of their genetic code and are often similar, they are never truly identical.. Which of the following explains these differences?
a. heterozygous chromosomal deviations
b. active gene-environment relationships
c. post-natal genetic mutations
d. nonshared environmental influences
Question 2
In many cultures,
a. older brothers typically take care of younger siblings.
b. younger siblings typically turn to older sisters when their mothers are unavailable.
c. the influence of older sisters on siblings disappears after adolescence.
d. as siblings reach adolescence, their conflict increases.
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