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Genetic Disorders - Sarah E. Goode STEM Academy
Genetic Disorders - Sarah E. Goode STEM Academy

... The mutation may have little or no effect. It also may result in a birth defect or may increase the person’s likelihood of developing a disease. ...
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Untitled - Pearson
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... During meiosis, the number of chromosomes per cell is cut in half through the separation of A. daughter cells. B. homologous chromosomes. C. gametes. D. chromatids. ...
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... environments. Greater variation within the species makes a population better suited to adaptation to changes in the environment. ...
C17.2 PPT - Destiny High School
C17.2 PPT - Destiny High School

... The mutation may have little or no effect. It also may result in a birth defect or may increase the person’s likelihood of developing a disease. ...
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... Variation: is demonstrated by the differences in appearance that offspring show from parents and siblings ...
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... * Types of traits 1. single-gene traits = have 1 allele (dominant or recessive) that determines phenotype Ex: widow’s peak (dominant trait), straight ...
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... It is a consequence of heredity, which results from the transmission of genes from parents to offspring Because they share similar genes, offspring more closely resemble their parents or close relatives than others ...
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Sex Determination and Sex

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Bacterial Genetics

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... including interstitial deletions and/or translocations between human and host chromosomes, although the rearrangement frequencies were relatively low (Nakagawa et al. 1996). To characterize them more precisely, we used WCP probes to determine the frequency of cells that retained the human chromosome ...
ppt - Department of Plant Sciences
ppt - Department of Plant Sciences

... Pure Line - a population that breeds true for a particular trait [this was an important innovation because any non-pure (segregating) generation would and did confuse the results of genetic experiments] Allele - one alternative form of a given allelic pair; tall and dwarf are the alleles for the hei ...
Cytogenetic method
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... Dicentrics are unstable and suitable for biodosimetry ...
Morgan and Gene Recombination
Morgan and Gene Recombination

... additive: 9% (b-cn) + 9.5% (cn-vg) > 17% (b-vg). • This results from multiple crossing over events. • A second crossing over “cancels out” the first and reduced the observed number of recombinant offspring. • Genes father apart (for example, b-vg) are more likely to experience multiple crossing over ...
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... 9. The exchange of chromosome segments between homologous chromosomes is called Crossing over 10. The tendency for two genes that are located close together on a chromosome to be inherited together is called. ...
Chapter 10 Meiosis
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... – Because alleles for the same trait can vary, new combinations of genes in each chromosome can result; this is one source of genetic variation – After crossing over, the nonsister chromaids ...
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Y chromosome



The Y chromosome is one of two sex chromosomes (allosomes) in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it is the presence or absence of Y that determines the male or female sex of offspring produced in sexual reproduction. In mammals, the Y chromosome contains the gene SRY, which triggers testis development. The DNA in the human Y chromosome is composed of about 59 million base pairs. The Y chromosome is passed only from father to son. With a 30% difference between humans and chimpanzees, the Y chromosome is one of the fastest evolving parts of the human genome. To date, over 200 Y-linked genes have been identified. All Y-linked genes are expressed and (apart from duplicated genes) hemizygous (present on only one chromosome) except in the cases of aneuploidy such as XYY syndrome or XXYY syndrome. (See Y linkage.)
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