Chapter 12 Science Flashcards
1
Q
lethal mutation
A
causes death, often before birth
2
Q
inversion
A
chromosome breaks and piece reattaches backwards
3
Q
autosome
A
chromosome not involved in sex determination
4
Q
sex chromosome
A
chromosome that determines sex
5
Q
Huntington’s disease
A
autosomal dominant trait
6
Q
chronic-villa sampling
A
sample is taken from between the uterus & the placenta
7
Q
amniocentesis
A
sample is taken from fluid-filled sack
8
Q
substitution
A
one nucleotide replaces another
9
Q
genetic disorder
A
disease caused by a mutation
10
Q
deletion
A
loss of a piece of chromosome
11
Q
genetic counseling
A
offers information about genetic makeup
12
Q
complex characters
A
influenced by both genetics & the environment
13
Q
chromosome map
A
diagram that shows the location of genes
14
Q
germ-cell mutation
A
occurs in a gamete
15
Q
cell-unit
A
frequency of crossing-over
