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Meiosis. Types of Human Cells. Sex Cells Gametes (germ cells) Eggs and Sperm Somatic Cells All other cells. Questions: 1, 2, 3, 4. Types of Chromosomes. Autosomes – same number in males and females Sex Chromosomes – X or Y Human females: XX Male females: XY - PowerPoint PPT Presentation
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Meiosis
Sex CellsGametes (germ cells)Eggs and Sperm
Somatic CellsAll other cells
Types of Human Cells
Questions: 1, 2, 3, 4
Autosomes – same number in males and females
Sex Chromosomes – X or Y
Human females: XX
Male females: XYTestosterone and
other hormones from the Y make a male
Types of Chromosomes
Question: 5
46 chromosomes in a somatic cell (23 pairs)
23 chromosomes in a gamete
Humans
Questions: 6, 7
Describes how many sets of different chromosomes a cell has.
n = number of chromosomes in 1 set (haploid number)
Haploid Cells: 1nDiploid Cells: 2nIn humans, n = 23 (the
number of different chromosomes we have)
Ploidy
32/16
62
Questions: the chart, 8, 9
Down Syndrome
Questions: 10, 11
Klinefelter’s Syndrome
Questions: 12, 13
Cause: NondisjunctionQuestion: 14