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Unit 5 Review
Unit 5 Review

... Name two of the three important roles of cell division True or false: Binary Fission produces two genetically unique cells Name the process by which single-celled eukaryotic organisms produce genetically identical copies of themselves How many daughter cells are formed in mitosis? What is the ploidy ...
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... b. a chart that can help you keep track of the alleles during genetic crosses c. named after an Augustinian monk in Brno, Moravia (currently part of the Czech Republic) 5. If a gene has alleles that are incompletely dominant, an individual that is heterozygous at this locus will have characteristics ...
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... Discuss ethical issues that may arise as a result of genetic testing for inherited conditions or disorders. Discuss the role of meiosis and sexual reproductio n in producing genetic variability in offspring. Include: crossing over and randomness ...
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... D. meiotic crossovers within the inverted interval will not be recovered in offspring. ...
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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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