Indicate if the statement is FALSE or TRUE:
1. Sister chromatids are the direct product of DNA replication. They are exactly identical, have the same genes at the same loci, and may have different alleles for the same gene.
2. Meiosis reduces the chromosome number by: discarding some of the chromosomes, reducing the length of each chromosome by half, the formation of polar bodies, and duplicating DNA once, followed by 2 cell divisions.
3. The number of chromosomes found in a human egg cell is 23.
4. X-inactivation shuts off the maternally inherited X chromosome in every cell.
5. A cell that has an abnormal number of chromosomes is called aneuploid.
6. A man who carries an X-linked allele will pass it on to all of his daughters and none of his sons.
7. One possible result of chromosomal breakage is for a fragment to join a nonhomologous chromosome. This is called translocation.
8. A person with one X chromosome will exhibit Turner syndrome.
9. The karyotype of a person with familial Down syndrome is 47XX+21.
10. Robertsonian translocation is represented as 45,XY, t(14,21).