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.
Some organisms used as models in genetic research
code brown
Genetic Defect
A genetic bottleneck reduces a population temporarily to very low levels, removing much of its genet
Fraternal twins share about 50 percent of their segregating genes.
Genetic complementation analysis