2011 Lect 11 Mendelian genetics 1

2011 Lect 11 Mendelian genetics 1 - Postpone Postponequiz2...

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ostpone quiz 2 Postpone quiz 2 pens Mo Feb 21 st pm Opens Mo Feb 21 , 5pm Closes Tue Feb 22 nd , 5pm Covers 3 lectures (11 13) 1
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endelian netics Mendelian genetics 2
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enetic question Genetic question ur mother has blue eyes your father has Your mother has blue eyes, your father has brown eyes. You have brown eyes. Why/How? 3
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Father with brown eyes and mother with blue BB x bb B B gametes bb ffspring 1): b offspring (F1): Bb You are a heterozygote with brown eyes 6 4
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Genotype, alleles and chromosomes yp , Mother: genotype bb Father: genotype BB Homologous chromosomes h bb BB Gamete types: b or b Alleles: B or B chromatids 5
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Meiosis: from two alleles to one 1 allele per gene placed in gamete Fertilization: combine alleles from two gametes Bb erm g Sperm Egg B b Zygote 6
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From parental generation to offspring(F1) ther with brown eyes and mother with blue Father with brown eyes and mother with blue B b BB x bb t B B gametes b b offspring (F1): Bb You are a heterozygote with brown eyes 6 7
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Punnett square represents fertilization Takes GAMETES from two parents nd ombines em and combines them A probability matrix l t male Gametes From: Offspring ratios: Genotypes : All Bb BB female Phenotypes All brown eyes Bb Bb b Bb Bb b 8
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ut Mendel didn’t know about meiosis But Mendel didn t know about meiosis 9
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endel’s causal question Mendel s causal question Observation: organisms vary, but offspring tend to look like parents HOW are traits passed on across generations? 10
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Preformed infant in sperm as drawn by Hartsoecker (1695) 11
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ypotheses at that time Hypotheses at that time formation transferred from father Information transferred from father
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2011 Lect 11 Mendelian genetics 1 - Postpone Postponequiz2...

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