Homework #24 (130222): Chapter 14 (due Friday 130222) 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: parents genes mixed • Particulate: parents genes still retain identity\ The blending theory was that genetic material contributed by the two parents mixes in a manner analogous to the way blue and yellow make green
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a) The characteristics that showed up most frequently were:One nose‚ pink coloured nose‚ 2 antennas‚ 6 legs‚ 2 eyes and 2 green humps were the most common characteristics. b) The Characteristics that showed up very seldom were:3 eyes‚ 2 body segments‚ blue legs‚ 1 antenna‚ a straight tail and 1 green hump. c) The following traits were found to be homozygous dominant:EE ( Eye number - 2 eyes)CC (Curly Tail)VV (Red eyes)d) The following traits were found to be heterozygous:Aa (Antenna number: 2 antennas)Mm
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Honors Biology – Genetics Mixed Review Worksheet For each of the following: o Identify the genotypes of the parents o Complete a Punnett Square o Give the genotypic AND phenotypic results of the cross (percentage OR ratio) 1. In fruit flies‚ long wings are dominant to short wings. Complete a cross between a short winged male and a heterozygous female. 2. In certain flowers‚ blue and yellow flowers are incompletely dominant to each other. Show the cross
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PCB 3063 Spring 2012 Problem Set 1 ANSWERS 1. Determine the types of gametes produced by each of the following individuals: a. Aa 1/2 A‚ 1/2 a b. AaBb 1/4 AB‚ 1/4 Ab‚ 1/4 aB‚ 1/4 ab c. AABb 1/2 AB‚ 1/ Ab d. AaBBCc 1/4 ABC‚ 1/4 aBC‚ 1/4 ABc‚ 1/4 aBc 2. Use the Punnett square to determine the genotypes in the progeny of each of the following crosses: a. Dd x Dd b. AaBB x AaBB c. CcEE x CCEe Notice: in every case‚ each parent produces
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Cell Cycle Describe how major events of cell division that enable the genome of one cell to be passed on to two daughter cells. List the phases of cell cycle and describe the sequence of events that occurs during each phase. There are two main stages of the cell cycle‚ with multiple subdivisions within each. Interphase is the first stage‚ and it’s composed of G1 (contents of the cell are duplicated sans the chromosomes)‚ S (chromosomal duplication)‚ and G2 (checkpoints) phase. After interphase‚
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12.6: “A Brilliant Law: Seg…” text + figures Monohybrid Cross 4 Explain the phrase “dihybrid cross” and state Mendel’s Principle of Independent Assortment. Ch. 12.6: “A Brilliant Law: Indep…” text + figures 5 Explain the phenomena of codominance‚ incomplete dominance and epistasis in terms of Mendel’s alleles at one or more loci. Ch. 12.6: “Brilliant Laws: Var…” text + figures 6 Apply Mendel’s principles to genetic problems that involve monohybrid and dihybrid crosses. Ch. 12.6:
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Terms to know: phylogenetic tree inheritance complete dominance character reciprocal cross incomplete dominance trait allele codominance ancestral trait gene pleiotropy derived trait dominant allele multiple alleles synapomorphy recessive allele epistasis homologous character genotype polygenic inheritance analogous character phenotype phenotypic plasticity convergent evolution homozygous norm of reaction adaptation heterozygous X-inactivation natural selection mutant crossing
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1) What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants? A) There is considerable genetic variation in garden peas. B) Traits are inherited in discrete units‚ and are not the results of "blending." C) Recessive genes occur more frequently in the F1 generation than do dominant ones. D) Genes are composed of DNA. E) An organism that is homozygous for many recessive traits is at a disadvantage. 2) How many unique gametes could be produced through
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genes‚ their enviroment and randomn life processes. For example‚ there can be incomplete dominance where there is a mix of alleles‚ where neither is dominant. An example‚ is a Red flower and a white flower that mate and make a pink flower. Codominance is where both alleles are expressed but not blended. Genes can be affected by enviroment and
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categories. 4) Assume that a cross is made between AaBb and aabb plants and that all the offspring are either AaBb or aabb. These results are consistent with the following circumstance: A) complete linkage. B) alternation of generations. C) codominance. D) incomplete dominance. E) hemizygosity. 5) Assume that a cross is made between AaBb and aabb plants and that the offspring occur in the following numbers: 106 AaBb‚ 48 Aabb‚ 52 aaBb‚ 94 aabb. These results are consistent with the following
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