Ch. 2 (student-FA08) - Slide 1 LIFE-SPAN DEVELOPMENT A...

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Slide 1 LIFE-SPAN DEVELOPMENT 2 A Topical Approach to Biological Beginnings
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Slide 2 Mitosis, Meiosis, and Fertilization Cellular reproduction in which cell’s nucleus duplicates itself and two new cells are formed. Specialized form of cell division that occurs to form eggs and sperm (gametes) Process that, in humans, begins when a female gamete (ovum) is fertilized by a male gamete (sperm) Single cell formed through fertilization Genetic Foundations
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Slide 3 DNA: The Collaborative Gene _____________ —threadlike structures that contain sequences of genes ___________ —units of hereditary information composed of DNA ___________ —complex molecule that contains genetic information Genetic Foundations
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Slide 4 Chromosomal Abnormalities Occur when the ovum and sperm do not have their normal set of ______chromosomes
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Slide 5 Down Syndrome Chromosomally transmitted form of mental retardation Caused by an extra chromosome (47 instead of 46 total chromosomes) _______________ (21 st chromosome) Incidence (annual): 1-in-800 overall births Genetic Foundations
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Slide 6 Down Syndrome Incidence risk of Down syndrome increases with mother's age 1 in 1,900 births at age 20 1 in 300 births at age 35 1 in 30 births at age 45 Genetic Foundations
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Slide 7 Sex-Linked Chromosomal Abnormalities ________________ Syndrome Males have an extra X chromosome-- resulting in __________. Tall stature, enlarged breasts, underdeveloped testes 1 in 800 males Treatment: hormone therapy Genetic Foundations
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Slide 8 Sex-Linked Chromosomal Abnormalities ______________ syndrome Abnormality in the X chromosome Cause more problems in males MR, LD or short attention span (ADD) Treatment: special education, speech and language therapy Genetic Foundations
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Slide 9 Sex-Linked Chromosomal Abnormalities ______________ Syndrome Females missing an X chromosome resulting in _________ short stature, webbed neck, sexual under- development, possibly infertile, possible MR, math problems 1 in 2,500 female births Treatment: hormone therapy Genetic Foundations
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Slide 10 Sex-Linked Chromosomal Abnormalities _________ Syndrome Males have an extra Y chromosome Above average height 1 in 1,000 male births Treatment: none necessary Genetic Foundations
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Slide 11 GENES
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Slide 12 The Human Genome Project The Human Genome Project (HGP) was the international, collaborative research program whose goal was the complete mapping and understanding of all the genes of human beings. All our genes together are known as our "genome."
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The Human Genome Project The HGP has revealed that there are somewhere between approximately 25,000 human genes. Their locations can now be identified.
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This note was uploaded on 09/23/2008 for the course GPSYC 160 taught by Professor Harris during the Fall '08 term at James Madison University.

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Ch. 2 (student-FA08) - Slide 1 LIFE-SPAN DEVELOPMENT A...

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