Sex linkage

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health

Chapter 11: Complex Inheritance and Human Heredity RECESSIVE GENETIC DISORDERS -A recessive trait that is expressed when the individual is homozygous recessive for the trait CYSTIC FIBROSIS -Affects the mucus-producing glands, digestive enzymes, and sweat glands ALBINISM -Caused by altered genes, resulting in the absence of melanin in hair and eyes TAY-SACHS DISEASE -Gangliosides (fatty acids) accumulate in the brain, inflating brain nerve cells and causing mental deterioration GALACTOSEMIA -Recssive genetic disorder characterized by the inability of the body to digest galactose DOMINANT GENETIC DISORDERS -Huntington's Disease affects the nervous system -Achondroplasia is a genetic condition that causes small body size and limbs that are comparatively short

Pedigree Lab

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X-linked recessive inheritance

Chromosomal crossover

Dominance

genotype

health

Zoe Collins Mrs. G AP Biology 20 March 2014 Pedigree Lab Introduction: Gregor Mendel laid the foundation for our knowledge on genetics, and as time went one scientists continued to confirm and extend Mendel?s ideas. Discoveries on subjects such as DNA structure, mitosis and meioses all explain Mendel?s hypotheses. Mendel demonstrated that genes on different chromosomes, or unlinked genes, are inherited separately under the idea of independent assortment. But due to linked genes gametes are often produced with different combinations of alleles that are different then those of the parents.

Pedigree Lab

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X-linked recessive inheritance

Chromosomal crossover

Dominance

genotype

health

Zoe Collins Mrs. G AP Biology 30 March 2014 Pedigree Lab Introduction: Gregor Mendel laid the foundation for our knowledge on genetics, and as time went one scientists continued to confirm and extend Mendel?s ideas. Discoveries on subjects such as DNA structure, mitosis and meioses all explain Mendel?s hypotheses. Mendel demonstrated that genes on different chromosomes, or unlinked genes, are inherited separately under the idea of independent assortment. But due to linked genes gametes are often produced with different combinations of alleles that are different then those of the parents.

biology chapter 3

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Answersto Select Chapter 3 Problems. 3-12. a. 1/4 b. 1/4 3-15. These are typical characteristics of X-linked inheritance. Affected males transmit the mutant X chromosome only to their daughters. A carrier female will have both affected and unaffected sons as well as both carrier and noncarrier daughters. The carrier daughters (sisters of the affected sons) will transmit the mutant gene, but the unaffected sons (brothers of the affected sons) will not. 3-20. DNA from males exhibits one band and that from females two bands, which suggests X-linked inheritance. This can be verified further by examining the pattern of inheritance. Sons exhibit a band present in the mother, and daughters exhibit one band present in the mother and one in the father (which

Cambell biology 9th Edition Chapter 14 Test bank

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Classical genetics