chromosomes and genetic inheritance Flashcards
1
Q
chromosomes contain
A
genetic blueprints for cellular function (genes and DNA)
2
Q
genetic information can be
A
replicated (cell division) or pass on to offspring (inheritable)
3
Q
karyotype
A
a photographic inventory of an individual’s chromosomes
4
Q
number of chromosomes essential to human survival
A
46
5
Q
monosomy
A
missing a chromosome
6
Q
trisomy
A
three chromosomes instead of two
7
Q
trisomy 21
A
- down syndrome
- most common chromosome-number abnormality
- occurs in about 1 out of every 700 births
8
Q
characteristic features of trisomy 21
A
- round face
- flattened nose bridge
- skin fold at inner corner of eye
- short stature
- heart defects
- can function socially
- can hold jobs
9
Q
XXY - klinefelter syndrome
A
- biologically male
- develop some female characteristics
10
Q
XYY - jacob’s syndrome
A
- biologically male
- less tones muscles
- delay in motor function
- may be taller
11
Q
XO - turner syndrome
A
- biologically female
- shorter
- cannot reproduce
