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Genetics - Aurora City School District
Genetics - Aurora City School District

...  A process called synapsis occurs, and homologous chromosomes, each composed of two sister chromatids, come together as pairs.  Resulting structure, consisting of four chromatids, is called a tetrad.  Chromatids of homologous chromosomes exchange segments in a process called crossing over:  Rear ...
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Reconstructing evolution: Gene transfer from plastids to the nucleus
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... evidence for the endosymbiotic origin of mitochondria and chloroplasts (Fig. 1) required answers to several fundamental questions.(5,6) Firstly, what is the evolutionary relationship between the nuclear genes that encode organellar proteins and the ancestral prokaryote genes of similar function that ...
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Daily Warm Ups, Q1
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Genetics Study Guide
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genetics problems - fiserscience.com
genetics problems - fiserscience.com

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Module one assignment

... biochemical reactions with which they are associated. Not only do geneticists study how characters are transmitted through generations they also explore the structure and working of genes and the other genetic material that control those characters. With ever increasing detail, geneticists are learn ...
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Genetic Variation: Overview

... Demographic stochasticity (genetic drift) tends to reduce genetic variation through the random loss of rare alleles. Predicting how these processes will influence genetic variation can be difficult, especially when several processes act in the same population. For this reason, we often use mathemati ...
Ovule and embryo development, apomixis and fertilization Abdul M
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... enlargement occurs but cell divisions are not detected. Gametogenesis is arrested after the formation of tetrads. In the ino mutants the outer integuments are missing but the inner integuments develop normally. The development of the embryo sac is also abnormal leading to sacs containing one and fou ...
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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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