'Population bottleneck' presentation slideshows

Lecture 2: Evolution of Populations Campbell & Reece chapters: Chapter 23

456 views • 45 slides

Mechanisms of Evolution

Mechanisms of Evolution. Mechanisms of Evolution. There are several: Natural Selection Gene Flow Genetic drift Mutations Non-random mating. Artificial Selection.

635 views • 36 slides

Evolution

Evolution. The process of change in the genetic makeup of populations. The basis of the change is change in gene frequencies over time. How the frequency of a mutant allele change in time under various evolutionary forces. Population.

566 views • 32 slides

Chapter 18 Population Genetics Genetic variation, detection, concepts, sources, and forces

Chapter 18 Population Genetics Genetic variation, detection, concepts, sources, and forces. What is population genetics?. Analyzes the amount and distribution of genetic variation in populations and the forces that control this variation

441 views • 21 slides

Microevolution

Microevolution. What is the smallest unit that can evolve? Individual Species Genus Population. Do you remember how evolution can be measured?. Measure the allele frequency in the gene pool. Final Answer?. d!. Calculating Allele Frequencies.

570 views • 17 slides

rare Mendelian diseases versus common multi-factorial diseases

e.g., cystic fibrosis is one of the most common life-shortening childhood-onset inherited diseases in the United States, affecting 1 in 3900 births; one of every 31 individuals is a carrier of the recessive disease allele

469 views • 16 slides

How does selection cause change in allele frequencies?

616 views • 13 slides

The Five Factors of Evolution

The Five Factors of Evolution. 1. Genetic drift is a change in allele frequencies due to chance. Genetic drift causes a loss of genetic diversity. It is most common in small populations. A population bottleneck can lead to genetic drift.

581 views • 8 slides

The Five Factors of Evolution

The Five Factors of Evolution. 1. Genetic drift is a change in allele frequencies due to chance. Genetic drift causes a loss of genetic diversity. It is most common in small populations. A population bottleneck can lead to genetic drift.

87 views • 8 slides

KEY CONCEPT Natural selection is not the only mechanism through which populations evolve.

KEY CONCEPT Natural selection is not the only mechanism through which populations evolve. bald eagle migration. Gene flow is the movement of alleles between populations. Gene flow occurs when individuals join new populations and reproduce. Gene flow keeps neighboring populations similar.

72 views • 7 slides

? Bottleneck effect ?

? ?. ? Bottleneck effect ?. Owen ? Rachael ?. Elephant seals.

199 views • 3 slides