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24 terms

Meiosis

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The phases of meiosis that cause the most variation in the four resulting daughter cells are
prophase I and anaphase I
How does the sexual life cycle increase the genetic variation in a species
by producing gametes with different combinations of parental chromosomes, by allowing the combination of chromosomes from two different individuals, by allowing recombination of alleles on a chromosome.
referring to a plant sexual life cycle, choose the pair of terms in which the first term describes the process that leads directly to the formation of gametes, while the second term describes restoration of the diploid chromosome number from the haploid state
gametophyte mitosis; fertilization
which of the following events occurs during prophase I of meiosis
synapsis and crossing over
at which stage of mitosis are chromosomes photographed in the preparation of a karyotype
metaphase
which of the following is the term for a human cell that contains 22 pairs autosomes and two X chromosomes
female somatic cell
all of the following are functions of meiosis in plants except
independent assortment of chromosomes
homologous chromosomes undergo synapses and crossing over occurs
meiosis I
this occurs when a cell divides to form two cells that are genetically identical
mitosis
centromeres uncouple and chromatids are separated from each other
mitosis and meiosis II
independent assortment of chromosomes occurs
meiosis I
the events during this process cause the majority of genetic recombinations
meiosis I
the process is preceded by a copy of DNA
mitosis and meiosis I
a cell with diploid number 4, chromosomes A, B, C, D. If meiosis occurred with the formation of homologous pairs AC and BD, and the chromosomes were then distributed randomly between the resulting cells, how many gametes could be formed.
4 (AB, AD, BC, and CD)
eukaryotic sexual life cycles show tremendous variation. of the following elements, which do all sexual life cycles have in common.
meiosis, fertilization, gametes
what is a karyotype
a method of organizing the homologous chromosomes of a cell in relation to their number, size, and type
if liver cells has 24 chromosomes, how many chromosomes does a sperm has
12
tetrads of chromosomes are aligned at the center of the cell; independent assortment follows
metaphase I
synapsis of homologous pairs occurs; crossing over may occur
prophase I
nuclear envelopes my form; no replication of chromosomes takes place
cytokinesis
centromeres of sister chromatids uncouple and chromatids separate
anaphase II
autosomes
non-sex chromosomes
in the alternation of generations found in plants
the gametophyte generation produces gametes by mitosis
homologous chromosomes
have identical genes for the same traits at the same loci