Chapter 10 And 11 Flashcards
Chromosome
Unit of genetic information and protein
Chromatid
Single Copt of the gene necessary for an organism
How much chromosomes do humans have?
23 pairs, 46 total
What are the home chromosomes?
22 pairs of autosomes, I pair of sex chromosomes
Ploidy
Set of chromosomes
Diploid
2n. Copies of gene
Haploid
One copy of gene
Homologous chromosomes
Member of a pair of chromosomes
What happens before cell division?
Cell divides and passes a copy of its DNA do each of its daughter cells
External factors
Environmental conditions and signaling molecules
Internal factors
Checkpoints and cell cycle control molecules
Cyclins
Cell cycle regulator. Advances cells through phases of cell cycle
What causes cancer?
Cell division without check points. Continues to divide
Apoptosis
Cell death
P53 protein
Monitors integrity. Activates enzymes