26.1 Flashcards
The reduction in the number of chromosomes to half the normal count occurs during:
crossing over.
meiosis.
mitosis.
fertilization.
The reduction in the number of chromosomes to half the normal count occurs during:
crossing over.
meiosis.
mitosis.
fertilization.
What shuffles the alleles and causes homologous chromosomes to no longer be identical during meiosis?
cytokinesis
crossing over
formation of tetrads
synapsis
What shuffles the alleles and causes homologous chromosomes to no longer be identical during meiosis?
cytokinesis
crossing over
formation of tetrads
synapsis
From one original cell, four genetically unique daughter cells, each with 23 nonreplicated chromosomes, are produced at the conclusion of meiosis II of spermatogenesis.
True
False
From one original cell, four genetically unique daughter cells, each with 23 nonreplicated chromosomes, are produced at the conclusion of meiosis II of spermatogenesis.
True
False
Meiosis is a special type of cell division that produces:
gametes.
myocytes.
hepatocytes.
neurons.
Meiosis is a special type of cell division that produces:
- gametes.
- myocytes.
- hepatocytes.
- neurons.
The _______produce gametes and sex hormones.
The gonads produce gametes and sex hormones.
During meiosis I, pairs of homologous chromosomes, each consisting of two sister chromatids, separate to produce haploid (1n) cells with 23 chromosomes.
Also, crossing over and independent assortment take place.
During meiosis II, homologous chromosomes separate into individual chromatids, potentially producing four haploid cells.
In addition, mitosis produces ______________ that are genetically identical to the original cell, but meiosis produces _______________ that are genetically unique.
In addition, mitosis produces two diploid (2n) cells that are genetically identical to the original cell, but meiosis produces up to four haploid cells that are genetically unique.
