Biology 1001A Lecture Notes - Zygote, Haplotype, Homologous Chromosome
30 Apr 2012
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Biology lecture 7: the case of mary jane. Question: recombination in prophase of meiosis i creates sister cromatids that now carry different alleles. When will a alleles separate from the a alleles into different cells: never, anaphase of meiosis i, anaphase of meiosis ii. She is informed that two of her kids are not hers. The doctors haven"t learned about dna fingerprints in mary jane"s case Females are indicated in circles, squares indicate males. A vertical line indicates one generation, and a horizontal line indicates a relationship. Everyone has a normal karyotype, in the case of mary jane. Chromosome specific stains result in different colours after uv illumination. In interphase the dna of a chromosome is sort of together and in the same area. When the chromatin is much more condensed into chromosomes, then we can match them up and arrange them into a standard display called a karyotype. Clicker question: to make a karyotype, cells are photographed in metaphase.
