BIOL 1011 Lecture Notes - Lecture 9: Cystic Fibrosis, Karyotype, Haemophilia A
27 Oct 2016
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Document Summary
Genes are units of info about heritable traits. In eukaryotes, genes distributed linearly among chromosomes. Locus is the location of a gene on a chromosome. Each chromosome has a short arm (p arm) and a long arm (q arm) Gene for cftr located on human chromosome 7. A karyotype is a picture of the chromosomes in a cell that is used to check for abnormalities. A karyotype is created by staining the chromosomes with dye and photographing them. Photograph of chromosomes is cut up an d arranged as homologous pairs to form karyotype diagram. Xx is female, and xy is male. Y chromosome is shorter than x chromosomes. Inherited conditions that cause mild to severe medical problems. Males are squares ( more males have hemophilia) If trait appears, then circle or square is filled in with red, if a carried, the circle is. In heterozygotes harmful allele is often masked, but it can still be passed on to offspring.
