HW #14 - AP Biology Period 4 #22 Liem Nguyen 11/7/09...

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AP Biology Period – 4 #22 Liem Nguyen 11/7/09 Homework #14 (091113): Chapter 14 (due Friday 091113) Total points: 20 for Attempt on all questions ONE Concept Map: 10 points Objectives Gregor Mendel’s Discoveries 1. Explain how Mendel’s particulate mechanism differed from the blending theory of inheritance. -blending theory of inheritance -idea that genetic material contributed by two parents mixes in a manner -ex: blue and yellow paints blend to make green -predicts that over many generations, freely mated pop. Will give rise to a uniform population of individuals -fails to explain other phenomena of inheritance (how traits reappear after skipping a generation) -Mendel’s particulate mechanism -“gene idea” -model that parents pass on discrete heritable units (genes) that retain separate identities in offspring Mendel’s particulate mechanism describes that parents pass on discrete heritable units of genes that have their own identities in offspring. The blending theory of inheritance describes that genetic material from two parents mixes, like how blue and yellow paint blend to make green. 2. Define the following terms: true-breeding, hybridization, monohybrid cross, P generation, F 1 generation, and F 2 generation. -true-breeding: refer to plants that produce offspring of the same variety during self- pollination -hybridization: (genetics) mating or crossing of two true-breeding varieties -monohybrid cross: cross between heterozygous -P generation: parent individuals from which offspring are derived in studies of inheritance -F1 generation: first filial, hybrid, offspring in series of genetic crosses -F2 generation: offspring resulting from interbreeding of hybrid F1 generation True-breeding refers to plants that produce same variety of offspring during self- pollination. Hybridization describes mating of two true-breeding varieties. Monohybrid cross is between heterozygous. P generation describes parent individuals offspring are derived from. F1 generation is the first filial. F2 generation is the offspring resulting from the F1 generation. 3. List and explain the four components of Mendel’s hypothesis that led him to deduce
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the law of segregation. -1: alternative versions of genes account for variations in inherited characters -2: for each character, an organism inherits two alleles, one from each parent -3: if the two alleles at a locus differ, then one dominant allele determines the organism’s appearance; the other recessive allele has no noticeable effect on the organism’s appearance -4: law of segregation, two alleles for a heritable character separate during gamete formation and end up in different gametes First concept states that different genes account for variations. Second, an organism inherits an allele from each parent. Third, if alleles differ, dominant allele gives an organism’s appearance, while recessive allele has no effect. Fourth, the law of segregation states that two alleles separate during gamete formation into different gametes.
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This note was uploaded on 11/06/2011 for the course AP BIO 101 taught by Professor Chan during the Fall '05 term at JFK.

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HW #14 - AP Biology Period 4 #22 Liem Nguyen 11/7/09...

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