ChromsomesBA

Changes in Chromosome Number Vocab: nondisjunction: both members of a homologous pair go into the same daughter cell, or when the sister chromatids fail to separate. trisomy: 1 type of chromosomes with three copies. monosomy: 1 type of chromosomes is present in a single copy. Barr body: 1 of the X chromosomes becomes a darkly staining mass of chromatid. Down Syndrome: trisomy 21 chromosomes. Turner Syndrome: zygote 1 X chromosome. Klinefelter Syndrome: XXY chromosome. Poly-X Females: 2 X chromosomes extra Barr bodies in the nucleus. Jacobs Syndrome: 2 Y chromosomes 1 X chromosome.

What are the two types of chromosomes and how many of each do we have in every cell? The sex chromosomes and the autosomes, each cell has 22 autosomes and one sex chromosome

Describe process that can change the normal number of chromosomes in a cell? a single mutation in the series of dna that changes the DNA. Delection is when and entire sequence is removed from the DNA. Translocation is when a sequence is moved to another point in the DNA

Name chromosome disorders due to an abnormal number of autosomal chromosomes. Downs syndrome and Edwards Syndrome

Name chromosome disorders due to an abnormal number of sex chromosomes. Turners syndrome and Klienfelters syndrome

Changes in Chromosome Structure Vocab: Deletion: end of a chromosome breaks off or two breaks of a chromosome leads to a segment. Duplication: a chromosomal segment found multiple times in the same chromosome Inversion: a segment of a chromosome is turned 180 degrees Translocation: movement of a chromosomal segment from one chromosome to another Williams syndrome: chromosome 7 loses a small piece Crit du Chat syndrome: chromosome 5 loses a small piece Alagille syndrome: deletion of chromosome 20 Chronic myelogenous leukemia: translocation from part of chromosome 22 to chromosome 9 Burkett lymphoma: translocation from part of chromosome 8 to chromosome 14 Name chromosome deletion syndromes. Williams Syndrome, Miller Dieker Syndrome

Name chromosome translocation syndromes. Burkett Lymphoma