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Chapter 13

BIOL 102 Chapter Notes - Chapter 13: Sister Chromatids, Asexual Reproduction, Allosome


Department
Biology
Course Code
BIOL 102
Professor
Dr. W.A. Snedden
Chapter
13

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Meiosis
Asexual reproduction- “clones” that are well-suited to their parent’s environment
Clonal reproduction- how many food crops are made asexually
Parthenogenesis- uses meiosis and/or mitosis to generate near clones of the parents
Chromosomes
Karyotype- ordered display of the chromosome pairs from a
cell
Sex chromosomes- determine sex of an individual
Autosomes- all of the other chromosome besides sex
chromosomes
Homologous chromosomes- pair of chromosomes, one
from mother, one from father
Females- homogenetic, have two X chromosomes
Males- heterogenetic, have one X and one Y chromosome
Stages of Meiosis
Interphase- chromosomes are duplicated to form sister chromatids
Meiosis I- pairs of homologous chromosomes separate
Prophase I- duplicated homologous chromosomes exchange information
Metaphase II-
chromosomes line up by
homologous pairs
Anaphase II- each pair
of homologous chromosomes
separate
Telophase II- two
haploid cells form, consisting
of two sister chromatids
Meiosis II- sister chromatids
separate into four gametes
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