Chapter 3: Nature Through Nurture

Question 1

Genetic Beginnings:

Answer 1

Fertilization > Zygote

Question 2

Molecular Genetics:

Answer 2

Chromosomes: made up of DNA
DNA: made up of genes

Question 3

Chromosomes:

Answer 3

-we have 23 pairs (23 from mother, 23 from father)
Pairs 1-22: autosomes
Pair 23: Sex chromosomes
XX= Female
XY= Male

Question 4

Genotypes
(Dominant and Recessive Genes)

Answer 4

• Complete genetic makeup of an individual but some genes are not expressed

Question 5

Phenotypes
(Dominant and Recessive Genes)

Answer 5

Genetic traits that you display

Question 6

Alleles:

Answer 6

Versions of the same gene

Question 7

Dominant Genes/Alleles

Answer 7

Always expressed

Question 8

Recessive Genes/Alleles:

Answer 8

Only expressed when there is 2 present

Question 9

Polygenic Inheritance:

Answer 9

Many genes interact together to produce particular trait or behavior

Question 10

Pleiotropic Effects:

Answer 10

Any single gene can affect many different traits