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long - David Pollock
long - David Pollock

... Multi-Species Conserved Sequences 950 of the 1,194 MCSs are neither exonic nor lie less than 1-kb upstream of transcribed sequence. Meaning they are otherwise hard to predict ...
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3687317_mlbio10_Ch13_TestA_3rd.indd

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B1 - Knockhardy
B1 - Knockhardy

... Instructions for how an organism develops are found in the nucleus • chromosomes are found in cell nuclei - they come in pairs • every human body cell has 23 chromosomes • genes are sections of DNA molecules that make up chromosomes • genes are instructions on how to make proteins - they are pairs • ...
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Section 6-1
Section 6-1

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what is Natural Selection

... EVOLUTION What is Natural Selection and What conditions make it possible? ...
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Lecture 1, Part I

... whose functions may include providing chromosomal structural integrity and regulating when, where, and in what quantity proteins are made (regulatory regions). • The terms exon and intron refer to coding (translated into a protein) and non-coding DNA, respectively. ...
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... subdivision and estimation of migration rates. We will discuss theoretical population models such as the group of single migration parameter models with two or n islands, stepping stone models, and multi-parameter models such as the migration matrix model. In this lecture I will concentrate on appro ...
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UNIT I: INTRODUCTION

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... • Homology searches, using BLAST, are a good way to find genes. If a DNA sequence closely matches a sequence from another organism, it has been evolutionarily conserved, and that usually means that it is an expressed gene. • Exon prediction: exons need to be open reading frames (no stop codons), and ...
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New Genes for Old – Revision Pack (B3)

... Inbreeding can lead to a reduction in the variety of alleles in the population (this is also known as the gene pool). This can lead to: ...
Mechanisms of Evolution: Microevolution
Mechanisms of Evolution: Microevolution

... Every diploid organism has two copies of every gene (one from mom, one from dad). Let’s consider a gene called A. It codes for an important enzyme, enzyme A. • A dominant allele (A) codes for normal, functional enzyme A. • A recessive allele (a) codes for non-functional enzyme. Genotypes and Phenoty ...
New Genes for Old – Revision Pack (B3)
New Genes for Old – Revision Pack (B3)

... Inbreeding can lead to a reduction in the variety of alleles in the population (this is also known as the gene pool). This can lead to: ...
< 1 ... 1597 1598 1599 1600 1601 1602 1603 1604 1605 ... 1937 >

Microevolution

Microevolution is the change in allele frequencies that occur over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow, and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed 'macroevolution' which is where greater differences in the population occur.Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself with observing microevolution in the wild. Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution. Macro and microevolution describe fundamentally identical processes on different scales.
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