Ch.6 Genetics Flashcards
1
Q
Presence of Y chromosome causes an embryo to develop as a
A
Male XY
2
Q
Absence of an X chromosome causes an embryo to develop as a
A
Female XX
3
Q
The genetic makeup of an individual is referred as the
A
genotype
4
Q
The observable expression of an individuals genotype (physical trait) is
A
phenotype
5
Q
Define mutation
A
Spontaneous and permanent change in normal gene structure
6
Q
Explain occurrence risk
A
Couple hasn’t had children but they are known to be at risk for having a child w/genetic disease
7
Q
Explain recurrence risk
A
Couple has 1 or more children w/genetic disease
8
Q
Autosomes
A
control most traits in body (22)
9
Q
Chromosomes
A
Packages of genes and other DNA in nucleus of cell
