1	XX		_____	male zygote
2	XY		_____	A weaker gene that can be dominated
3	genotype		_____	traits influenced by only one pair of genes, one from the mother and one from the father
4	phenotype		_____	the activation of particular genes in particular cells which influences traits
5	epigenetic effects		_____	two genes expressed, such as A and B blood types producing AB blood type in children
6	gene expression		_____	produces new trait, such as red and white flowers producing pink
7	single gene-pair inheritance		_____	the traits a person eventually has
8	dominant gene		_____	the sum total of genes transmitted from parent to offspring
9	recessive gene		_____	attributes influenced by single genes, usually on X chromosome
10	incomplete dominance		_____	A gene that is expressed phenotypically
11	codominance		_____	more common among males, sex-linked on X chromosome
12	sex-linked characteristcs		_____	ways in which genetic information is modified by environment and translated into the substance and behavior of an organism
13	hemophilia		_____	characteristics influenced by multiple pairs of genes
14	polygenic traits		_____	female zygote