BIO 101 Lecture Notes - Lecture 12: Characteristic Class, Organelle, Cytoplasm

• School: URI
• Department: Biological Sciences
• Course: BIO 101
• Professor: Van Sciver Barbara

Document Summary

2 identical cells to each other and to the parent cells. 2 divisions daughter cells develop into the gametes (reproductive cells) Cytokinesis is when the cytoplasm actual splits-division of the cytoplasm. Threadlike structures of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes. Origin: late 19th century, coined in german from greek khroma color" + soma body . Diploid-each species has a characteristic number of chromosomes-human have 46, 23 pairs. One pair from mom, one pair from dad. **look at the 23rd pair to figure out the sex of karyotype. Sperm and egg have half the number of chromosomes so when they fertilize, you get the diploid number. Haploid number of chromosomes-half the number of chromosomes of all other cells- sperm and egg. Before cell division, chromosomes condense and look like what we see. Before that, they look like a ball of thread.