Biology 311C Lecture 38

Biology 311C Lecture 38 - • The diploid zygote is a...

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November 28, 2011 Biology 311C Lecture 37 Tumor-suppressor genes help prevent uncontrolled cell growth, e.g. inhibit the cell cycle in the cell signaling pathway. A gene is sequence of DNA that codes for polypeptide chains and RNA molecules. We inherit 23 chromosomes each from our parents. On the chromosomes, we find the genes. The trait, or phenotype, is the physical manifestation of the genes. The genotype codes for the phenotype.
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Unformatted text preview: • The diploid zygote is a single cell that has all 46 chromosomes. • Through meiosis, the diploid zygote becomes a haploid. • Meiosis is necessary to create gametes that contain half of the genetic information. • A homologous chromosome code for the same thing. They are in the same location. • We have 44 autosomes and 2 sex chromosomes. We have 92 chromatids in total. • Alleles are alternate forms of a gene....
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