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Human Chromosomes and Genetic Traits

Explore the role of chromosomes in human development and the inheritance of genetic traits. Learn about different syndromes and genetic interactions.

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Human Chromosomes and Genetic Traits

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  1. The Developing Person Through Childhood and Adolescence, Tenth Editionby Kathleen Stassen BergerClicker Question Presentation SlidesChapter 3 Critical Thinking Questions created by Sara Harris, Illinois State Unviersity

  2. Humans have ____ chromosomes. • 23 • 23 pairs of • 46 pairs of • 46 matching

  3. When a sperm and an ovum fuse, a one-celled _____ is formed. • zygote • nucleus • gamete • allele

  4. In ____, cells begin to specialize, taking different forms and reproducing at various rates. • the second trimester • duplication • genetic activation • differentiation

  5. Genes that produce characteristic traits through the interaction of genetics and environmental influences are referred to as: • additive. • multifactorial. • polygenic. • phenotypes.

  6. Some men are color-blind because they inherit a particular recessive gene from their mother. That recessive gene is carried on the ____ chromosome. • X • XY • Y • X or Y

  7. Critical Thinking Questions

  8. Child A’s 23rd pair of chromosomes is XX. Child A: • has Down syndrome. • can be either male or female. • is female. • is male.

  9. Bailey is very short and has a webbed neck. Although she is now 19, Bailey never developed breasts, nor did she experience menstruation. She has always struggled with math and has difficulty recognizing facial expressions of emotion. Bailey has ___ Syndrome. • Down • Klinefelter • Triple X • Turner

  10. Marcus inherited a small deletion of chromosome 15 from his father’s chromosome 15. As a toddler, Marcus was diagnosed with Prader-Willi syndrome. This example illustrates: • parental imprinting. • dominant-recessive heredity. • epigenetics. • differentiation.

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