Biology 15.1 Review
Use the words below to fill in the blanks. Words will be used only once.
Autosomes
XX
Genome
XY
Karyotype
sex chromosomes
pedigree
1.
A(n) ________________ is the full set of genetic information that an organism carries in
its DNA.
2.
A(n) _______________________ shows the complete diploid set of chromosomes grouped
together in pairs, arranged in order of decreasing size.
3.
The __________________ are the X and Y. Females have ___________ and males have
____________.
4.
The chromosomes that don’t determine sex are called _____________________.
5.
A(n) __________________ is a chart that shows the presence or absence of a trait over
several generations.
Short answer:
6.
How many chromosomes do humans have in their diploid cells?
7.
Why are calico cats always female?
8.
Why is colorblindness more common in males?
9.
Healthy parents may have children who suffer from Tay-Sachs disease, a genetic
disorder. Based on this evidence, is Tay-Sachs caused by a dominant or recessive
allele? Explain.