Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 18.6, Problem 2EQ
Summary Introduction
To determine: The expected results of Bateson and Punnett’s cross of F1 plants.
Introduction: Bateson and Punnett in the year 1911 conducted an experiment on sweet peas. They made a cross of sweet peas showing linkage between two different genes. In their study they took into consideration two traits- the flower color and pollen shape.
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Knowing that the Curly leaf (Cy) is a dominant gene on chromosome 6, as it is useful in tracking other genes using trisomics for chromosome 6. Assume a Cy Cy cy plant used as a pollen parent where disomic pollen does not function crossed to a Cy cy cy female where disomic eggs do function.
A) What ratio would be predicted in the progeny of this cross?
B) What if the reciprocal cross was made?
Question:-
For a simple cross between a purple-flowered plant and a white-flowered plant, where purple is dominant over white.
a. Show the F2 in a Punnett square. What are the proportions of genotypes and phenotypes? Express as fractions, decimal fractions and ratios.
b. Now imagine that half of the pollen carrying the recessive allele die before reaching their target, while those carrying the dominant allele are unaffected; what are the proportions of genotypes and phenotypes now?What does this tell you about Mendel’s principle of segregation?
HELP URGENTLY!!! NEED RESPONSE FAST
Genes A, B and C are on the same chromosome linked in cis (coupling) conformation. A is 13 cM from B, and B is 28 cM from C. The distance between A and C is 41 cM. The coefficient of coincidence is 0.45 for a trihybrid test cross. How many individuals with the genotype aaBbcc do you expect to see among the offspring of the cross if 1000 offspring are obtained? Please show your calculations and round your answer off to the nearest whole number.
Chapter 18 Solutions
Biology
Ch. 18.2 - Prob. 1CCCh. 18.3 - Prob. 1CCCh. 18.3 - Prob. 1CSCh. 18.5 - Prob. 1CSCh. 18.5 - Prob. 1CCCh. 18.6 - Prob. 1EQCh. 18.6 - Prob. 2EQCh. 18.6 - Prob. 3EQCh. 18.6 - Prob. 1CCCh. 18.6 - Prob. 2CC
Ch. 18 - Which of the following is an example of an...Ch. 18 - Prob. 2TYCh. 18 - A female mouse that is Igf2 Igf2 is crossed to a...Ch. 18 - Prob. 4TYCh. 18 - Prob. 5TYCh. 18 - Prob. 6TYCh. 18 - Prob. 7TYCh. 18 - Prob. 8TYCh. 18 - Based on the ideas proposed by Morgan, which of...Ch. 18 - Extranuclear inheritance occurs because a. certain...Ch. 18 - Define epigenetics. Are all epigenetic changes...Ch. 18 - What is a Barr body? How is its structure...Ch. 18 - Core Concept: Information A core concept of...Ch. 18 - Prob. 1COQCh. 18 - Mendel studied seven traits in garden pea plants,...
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