Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
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ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Chapter 12.1, Problem 2CC
MAKE CONNECTIONS Review the description of meiosis (see Figure 10.8) and Mendel’s laws of segregation and independent assortment (see Concept 11.1). What is the physical basis for each of Mendel’s laws?
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Q5. When Mendel crossed a large number of tall pea plants with short pea plants, all F1 plants
were tall. The F2 generation was created by self-pollinating the F1 plants.
(a) Complete a genetic cross of F1 to show the genotypes and phenotypes of the parents and
offspring.
(b) Complete a genetic cross of F2 to show the genotypes and phenotypes of the offspring.
(c) State the ratio of phenotypes expected in the F2 offspring.
(d) Mendel's First Law of inheritance states that, “...the alleles of a given locus segregate into
separate gametes." Explain how the genetic diagram above proves this law. (AC 2.1)
Part 1: Make a three part process drawing (like a cartoon strip) to demonstrate Mendel’s Principle of Segregation. Use two parents with homologous chromosomes marked with alleles “A” and “a”.
Circle and label these three action parts of the Principle of Segregation: a) parents are diploid, b) alleles separate to form haploid gametes (indicate when this happens), and c) gametes from each parent combine at random to form diploid offspring
Part 2: Use the cross Aa x Aa and a Punnett square to demonstrate Mendel’s Principle of Segregation. Circle and label these three action parts of the Principle of Segregation: a) parents are diploid, b) alleles separate to form haploid gametes and c) gametes from each parent combine at random to form diploid offspring. Write the expected genotypic and phenotypic ratios.
Chapter 12 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
Ch. 12.1 - Which one of Mendels laws relates to the...Ch. 12.1 - MAKE CONNECTIONS Review the description of meiosis...Ch. 12.1 - WHAT IF? Propose a possible reason that the first...Ch. 12.2 - A white-eyed female Drosophila is mated with a...Ch. 12.2 - Neither Tim nor Rhoda has Duchenne muscular...Ch. 12.2 - MAKE CONNECTIONS Consider what you learned about...Ch. 12.3 - When two genes are located on the same chromosome,...Ch. 12.3 - For each type of offspring of the testcross in...Ch. 12.3 - WHAT IF? Genes A, B, and C are located on the same...Ch. 12.4 - About 5% of individuals with Down syndrome have a...
Ch. 12.4 - WHAT IF? The ABO blood type locus has been mapped...Ch. 12.4 - MAKE CONNECTIONS The gene that is activated on the...Ch. 12.4 - Women born with an extra X chromosome (XXX) are...Ch. 12 - A man with hemophilia (a recessive, sex-linked...Ch. 12 - Pseudohypertrophic muscular dystrophy is an...Ch. 12 - A space probe discovers a planet inhabited by...Ch. 12 - Using the information from problem 3, scientists...Ch. 12 - A man with red-green color blindness (a recessive,...Ch. 12 - You design Drosophila crosses to provide...Ch. 12 - A wild-type fruit fly (heterozygous for gray body...Ch. 12 - Assume that genes A and B are 50 map units apart...Ch. 12 - Prob. 9TYUCh. 12 - SCIENTIFIC INQUIRY DRAW IT Assume you are mapping...Ch. 12 - FOCUS ON EVOLUTION Crossing over is thought to be...Ch. 12 - FOCUS ON INFORMATION The continuity of life is...Ch. 12 - SYNTHESIZE YOUR KNOWLEDGE Butterflies have an X-Y...
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- Part 1: Make a three part process drawing (like a cartoon strip) to demonstrate Mendel's Principle of Segregation. Use two parents with homologous chromosomes marked with alleles "A" and "a". Circle and label these three action parts of the Principle of Segregation: a) parents are diploid, b) alleles separate to form haploid gametes (indicate when this happens), and c) gametes from each parent combine at random to form diploid offspring Part 2: Use the cross Aa x Aa and a Punnett square to demonstrate Mendel's Principle of Segregation. Circle and label these three action parts of the Principle of Segregation: a) parents are diploid, b) alleles separate to form haploid gametes and c) gametes from each parent combine at random to form diploid offspring. Part 3: Use homologous chromosomes marked with alleles "A" and "a" and a second pair of homologs marked with alleles "B" and "b". to demonstrate Mendel's Principle of Independent Assortment in cells in Meiosis. Indicate what phase this…arrow_forwardneeding help with (c) and (d)arrow_forwardO Macmillan Learning Assume that the length of wheat leaves is controlled by three loci, each with two alleles: L and I, W and w, H and h. Determine the differences in leaf length between two homozygous strains of wheat. Assume each allele contributes equally to the length of the plant leaves. One homozygous strain, Il ww hh, has leaves that are 100 mm in length, and the other strain, LL WW HH, has 220 mm leaves. The two homozygous strains are crossed, and the resulting F₁ are selfed to produce F₂ progeny. What length will the leaves of the Ll Ww Hh genotype plant be? leaf length: What proportion of the F2 progeny will have the same phenotype as the LI Ww Hh genotype? Input answer as a decimal. proportion: mmarrow_forward
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- Ee.17.arrow_forwardWhich is one of the seven characteristics that Mendel observed in pea plants? flower size seed texture leaf shape stem colorarrow_forwardMendel performs a cross using a true-breeding pea plant with round, yellow seeds and a true- breeding pea plant with green, wrinkled seeds. What is the probability that offspring will have green, round seeds? Calculate the probability for the F1 and F2 generations.arrow_forward
- Notes Bell Work Assignments Pedigree Chart Key How many females are carriers? |JO - Unaffected How many affected males are there? TO Carrier Complete a Punnett Square for the cross in the F4 generation. 10 Affected The affectedallele is recessive I Could the male in the F5 generation be affected? Could he be a carrier? If 'yes', what chance does he have of being affected? Of being a carrier? (answer is a fraction out of 4) Type here to search W Brarrow_forwardPls helparrow_forwardDirection: Solve the following problems using Mendelian principles of heredity. Show your complete solution. 1.) In an Abbey garden, Mendel proposed that crossing pea plants with wrinkle seed to pure round-seeded plants produced only round-seeded plants. Based on the problem, determine the ratios for genotypes and phenotypes that can be expected from a cross of a wrinkle-seeded plant & a plant heterozygous for this trait?arrow_forward
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