Download Ch 13 Notes

Meiosis and Sexual Life Cycles
Chapter 13
Genetics
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Genetics is the
Heredity is the
Variation is
Inheritance of Genes
Genes are segments of
Gametes are
During ________________________, gametes unite to form a
_________________, which develops into an _______________, then a
_______________, and then a _______________.
Types of Reproduction
Asexual: a single
Sexual: two
Karyotypes
A karyotype is a
Homologous chromosomes are
Types of Chromosomes
22
1 pair
Women =
Men =
Diploid vs. Haploid
Diploid Cells:
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Haploid Cells:
Meiosis
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Meiosis is
It ONLY happens
Meiosis
It’s like double mitosis –
That way, after fertilization, the
4 daughter
The process of meiosis
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Meiosis happens
Interphase
Prophase I
Crossing Over
Metaphase I
Anaphase I
Telophase I and Cytokinesis
Prophase II
Metaphase II
Anaphase II
Telophase II and Cytokinesis
Mitosis vs. Meiosis
Mitosis
Meiosis
Why is crossing over important?
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During Prophase I,
This produces
Powers natural selection/evolution:
Makes species more
Random Fertilization
Each egg or sperm represents
This is because during Metaphase I,
So,
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Each zygote