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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


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


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


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


centromeres of sister chromatids uncouple and chromatids separate

anaphase II


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

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