Karyotypes & Sex-Linked Traits Flashcards
1
Q
Humans normally have ______ chromosomes.
A
46
2
Q
Karyotype:
A
Karyotype: a picture that shows the complete set of chromosomes grouped together in pairs, arranged in order of decreasing size.
3
Q
Arranged from _________ to ___________
A
largest, smallest
4
Q
First 22 pairs are known as …
A
autosomal chromosomes (autosomes)
5
Q
23rd pair -
A
sex chromosomes.
6
Q
Extra chromosome in a pair is a ________ (three instead of two).
A
trisomy
7
Q
Females:
A
XX
8
Q
Males:
A
XY
9
Q
Because females have two X chromosomes, a “______” trait can be covered by a “_______” one on the other X.
A
bad, good
10
Q
Males only have one X chromosome, so they are …
A
unable to hide the trait.
