BIOC19H3 Lecture 2: Notes
Document Summary
During cell division, all daughter cells must get same genetic info: site of gene expression: where certain set of genes are turned on and transcribed, dna synthesis, rna synthesis, rna splicing, and rna polyadenylation. Cytoplasm: site of protein synthesis using mrna from nucleus, location of cytoplasmic organelles that perform specific functions: mitochondria, golgi, chloroplasts. Yes, because it tells cytoplasm what proteins to synthesize. Yes, in early experiments, people realized cytoplasm can affect activity of nucleus. Cytoplasmic factors (transcription factors) move to nucleus and turn on specific gene expression. Early embryogenesis: zygote is early embryo at 1 cell stage, when egg and sperm fertilize egg. Then it proceeds to early cleavage (cellular division), forming 2, 4, and 8 cells (morula). Morula is solid mass that doesn"t have a hollow core and is made of blastomeres. Then we get further cleavage of morula to form blastula which is a hollow ball of up to 128 cells.
