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Why are some crosses not performed in a complementation matrix?

Basic Clinical Laboratory Techniques 6E

6th Edition

ISBN:9781133893943

Author:ESTRIDGE

Publisher:ESTRIDGE

Chapter4: Basic Immunology And Immunohematology

Section4.6: Abo Grouping

Problem 6RQ

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Concept explainers

Genome annotation

The technique of linking biological information to genome sequences is termed genome annotation. Gene annotation is the method of identifying gene locations and coding sections. It helps us understand what these genes are doing in the body through establishing structural characteristics and linking them to the actions of various proteins.

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Why are some crosses not performed in a complementation matrix?

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Could you have generated a chromosome map from the F2 progeny in cross 1 (assuming you crossed F1 males and females to each other to generate the F2)? What is the advantage of using cross 2 instead?
What are monohybrid crosses? Is it possible to make a cross in which only one single character is actually involved, or is it just that one single character is being analyzed and the others are being ignored?
An individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B • C D E F G A B • C D V W X R S • T U E F G R S • T U V W X Q. Give the products that result from alternate, adjacent-1, and adjacent-2 segregation.
Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were counted, with the following results: 474 Aabb, 480 aaBb, 20 AaBb, and 26 aabb. What type of cross is it? Are these locilinked? What are the two parental classes and the two recombinant classes of offspring? What is the percentage of recombination between these two loci? How many map units apart are they?
An individual is heterozygous for a reciprocal translocation, with the following chromosomes: A • B C D E F A • B C V W X R ST • U D E F R ST • U V W X Q. Draw the products of alternate, adjacent-1, and adjacent-2 segregations.
Under what circumstance might two loci be on the same chromosome but behave as if independently assorting in crosses?
Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were counted, with the following results: 474 Aabb, 480 aaBb, 20 AaBb, and 26 aabb. What type of cross is it? Are these loci linked? What are the two parental classes and the two recombinant classes of offspring? What is the percentage of recombination between these two loci? How many map units apart are they?
You want to determine whether genes a and b are linked. What cross would you use and why? How would this cross tell you if they are linked?
What is nonhomologous recombination?
AaBb individuals were crossed to aabb individuals. The following progeny were observed: 5 AaBb, 45 aaBb, 45 Aabb, 5 aabb. Two of the AaBb progeny were crossed to each other. Which of the following would be the nonrecombinant chromosomes in this cross (AaBb X AaBb)?
Write the genotypes of all recombinant and nonrecombinant progeny expected from the following three-point cross: m+ pt st
in three points mapping one parent has the A+C/+b+ genotype that was crossed to a homozygous recessive second parent. a)what is the genotype of this second parent? b)what are the genotypes of the double cross over offspring?