Chapter 2

Question 1

niche picking

Answer 1

deliberately seeking environments that fit ones heredity

Question 2

nonshared environmental influences

Answer 2

environmental forces that make siblings different from eachother

Question 3

methylation

Answer 3

experiences can change the expression of DNA

Question 4

what is chemical silencer of methylation

Answer 4

methyl molcule

Question 5

phenotypic plasticity

Answer 5

environment influences gene expression and modifies the genome

Question 6

CRISPR

Answer 6

clustered regularly interspaced short palindromic repeats

Question 7

what does CRISPR do

Answer 7

allows for specific genetic material to be deleted and replaced by other DNA

Question 8

what are 4 issues with IVF?

Answer 8

• expensive
• only 1/3 attempts succeed
• if woman becomes pregnant, more likely for twins/triplets
• mother at greater risk of having baby with low birth weight / defects

Question 9

reaction range

Answer 9

range of phenotypes that the same genotype may produce in reaction to environment where development takes place

Question 10

polygenic inheritance

Answer 10

phenotypes that reflect combined activity of many separate genes

Question 11

genotype

Answer 11

complete set of genes that make up someone’s heredity

Question 12

which chromosome has fewest genes

Answer 12

chromosome Y

Question 13

which chromosome has most genes

Answer 13

chromosome 1

Question 14

how many DNA molecules does each chromosome have

Answer 14

1

Question 15

autosomes

Answer 15

first 22 pairs of chromosomes