chapter 27 human genetics
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Chapter 27 Human Genetics. 27.1 Role of Chromosomes 27.2 Human Traits 27. 3 Genetic Disorders. 27.1 Role of Chromosomes. Chromosome number How to tell the chromosome number Sex Determination. Human Chromosomes. Each sperm or egg has 23 chromosomes

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chapter 27 human genetics

Chapter 27 Human Genetics

27.1 Role of Chromosomes

27.2 Human Traits

27. 3 Genetic Disorders

27 1 role of chromosomes
27.1 Role of Chromosomes
  • Chromosome number
  • How to tell the chromosome number
  • Sex Determination
human chromosomes
Human Chromosomes
  • Each sperm or egg has 23 chromosomes
  • Each body cell has 23 pairs or 46 chromosomes
  • Different organisms have different numbers of chromosomes
amniocenteses
Amniocenteses
  • Dr.’s analyze the amniotic fluid of an unborn baby
  • Able to count the number of chromosomes
  • Look for genetic disorders

http://www.muschealth.com/animations/interactivebody.htm

karyotype
Karyotype
  • Complete set of all chromosomes of a cell of an organism
  • Arranged and displayed : in pairs, ordered by size.
determining sex
Determining Sex
  • Determined by male sperm
  • Female eggs carry only X chromosomes
  • Male sperm can be X or Y
  • Genotype Male: XY
  • Genotype Female: XX
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