Genetics
Genetics
5th Edition
ISBN: 9781464109461
Author: Benjamin A. Pierce
Publisher: MAC HIGHER
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Chapter 19.2, Problem 10COQ
Summary Introduction

To explain:

The way by which polymerase chain reaction is used to amplify specific DNA sequence.

Introduction:

PCR (polymerase chain reaction) is a technique used in molecular biology to amplify a single copy or few copies of segment of DNA to synthesize the new strand of DNA. PCR is used to make copies of DNA. It is of many types like, real time PCR, nested PCR, and semi- nested PCR. PCR is having three main steps that are denaturing, annealing, and extension. PCR reaction contains template DNA, primers, deoxynucleotide triphosphates, DNA polymerase, Mg 2+ ions, and buffer.

Summary Introduction

To determine:

The limitation of the PCR.

Introduction:

PCR is polymerase chain reaction, which make many copies of DNA from a single copy of DNA. It takes place in 3 steps: denaturation, annealing, and extension. PCR is fast, accurate and best method to amplify DNA. It has some limitation like, taq polymerase enzyme is unable to carry out the process of proof-reading, and it only makes copies up to 20,000 base pair.

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Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:
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