BIO152H5 Lecture Notes - Lecture 9: Color Blindness, Nondisjunction, Drosophila Melanogaster

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5 Mar 2018
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Punnett square : named after reginald c. punnett (devised the approach) Facultative parthenogenesis (switch from sexual to asexual) All the offspring were homozygous at loci - but not identical to mom. Offspring are not all the same as each other , and different from each other. Offspring not the same as each other, but they are homozygous at all loci. Egg after completing meiosis, duplicates its dna. Komodo use zw as a system for sex determination (zw are females, zz are males) The eggs that were not viable had ww. All offspring will be male if parthenogenesis occurs. 70 species of all vertebrates (can perform parthenogenesis) Mammals have imprinted genetic regions (why mammals not parthenogenesis) Outcome of one toss has no impact on outcome of next toss. Ex. what chance if an offspring is sickle cell or. Dominant allele does not subdue a recessive allele. Iaib = ab group (the write way to write it ) - codominance.