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Figure Number
File Name
Title
4.3
 Different dominance relationships.How the X and Y chromosomes determine sex in humans.
4.4
 Diploid versus haploid: 2 n versus n.
4.5
 Metaphase chromosomes can be classified by centromere position.
4.7
 The cell cycle: An alternation between interphase and mitosis.
4.8
 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei.
4.9
 Cytokinesis: The cytoplasm divides, producing two daughter cells.
4.11
 Checkpoints help regulate the cell cycle.
4.12
 An overview of meiosis: The chromosomes replicate once, while the nuclei divide twice.
4.13top left
 Meiosis: One diplod cell produces four haploid cells.
4.13middle left
 Meiosis: One diplod cell produces four haploid cells.
4.13bottom left
 Meiosis: One diplod cell produces four haploid cells.
4.13top right
 Meiosis: One diplod cell produces four haploid cells.
4.13middle right
 Meiosis: One diplod cell produces four haploid cells.
4.13bottom right
 Meiosis: One diplod cell produces four haploid cells.
4.14
 Prophase I of meiosis at very high magnification.
4.15
How crossing-over produces recombined chromosomes.
4.17
 How meiosis contributes to genetic diversity.
4.18
 n humans, egg formation begins in the fetal ovaries and arrests during the prophase of meiosis I.
4.19
 Human sperm form continuously in the testes after puberty.
4.20
 ADrosophilla eye color gene is located on the X chromosome.
4.21
 Nondisjunction: Rare mistakes in meiosis help confirm the chromosome theory.
4.23
 X-linked traits may be recessive or dominant.
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NameTitle
File Name
Title
CO4
 Each of these three human chromosomes carries hundreds to thousands of genes.
4.1
 Down syndrome: One extra chromosome 21 has widespread phenotypic consequences.
4.2
 The great lubber grasshopper.
4.3
 How the X and Y chromosomes determine sex in humans.
4.6
 Karyotype of a human male.
4.8
 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei.
4.9
 Cytokinesis: The cytoplasm divides, producing two daughter cells.
4.10
 If cytokinesis does not follow mitosis, one cell may contain many nuclei.
A, p. 88
 Metaphase and anaphase chromosomes in a wild type male fruit fly.
B, p. 88
 Metaphase and anaphase chromosomes in a mutant fly.
4.16
 Hybrid sterility: When chromosomes cannot pair during meiosis I, they will segregate improperly.
4.22
 ed-green colorblindness is an X-linked recessive trait in humans.