How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis? A.
They have twice the amount of cytoplasm and half the amount of DNA. B.
They have half the number of chromosomes and half the amount of DNA. C.
They have the same number of chromosomes and half the amount of DNA. D.
They have half the number of chromosomes and one-fourth the amount of DNA. E.
They have half the amount of cytoplasm and twice the amount of DNA. D.
They have half the number of chromosomes and one-fourth the amount of DNA. After telophase I of meiosis, the chromosomal makeup of each daughter cell is A.
diploid, and the chromosomes are each composed of a single chromatid. B.
diploid, and the chromosomes are each composed of two chromatids. C.
haploid, and the chromosomes are each composed of a single chromatid. D.
haploid, and the chromosomes are each composed of two chromatids. E.
tetraploid, and the chromosomes are each composed of two chromatids. D.
haploid, and the chromosomes are each composed of two chromatids. A given organism has 46 chromosomes in its karyotype. We can therefore conclude which of the
following? A.
It must be human. B.
It must be a primate. C.
It must be an animal. D.
It must be sexually reproducing. E.
Its gametes must have 23 chromosomes. E) Its gametes must have 23 chromosomes. Homologous chromosomes move toward opposite poles of a dividing cell during A.
mitosis. B.
meiosis I. C.
meiosis II. D.
fertilization. E.
binary fission. B.
meiosis I. For the following questions, match the key event of meiosis with the stages listed below. I. Prophase 1 V. Prophase
II. Metaphase I VI. Metaphase
III. Anaphase I VII. Anaphase II
IV. Telophase VIII. Telophase II Centromeres of sister chromatids disjoin and chromatids separate. A.
I B.
II C.
IV D.
V E.
VII B.
II Which life cycle stage is found in plants but not animals? A.
gamete B.
zygote C.
multicellular diploid D.
multicellular haploid E.
unicellular diploid D) multicellular haploid To view and analyze human chromosomes in a
dividing cell, which of the following is/are required? A.
electron microscope B.
radioactive staining C.
fluorescent staining D.
DNA stain and a light microscope E.
a stain particular to human cells D.
DNA stain and a light microscope Which of these statements is false? A.
In humans, each of the 22 maternal autosomes has a homologous paternal
chromosome. B.
In humans, the 23rd pair, the sex chromosomes, determines whether the person is female (XX) or male (XY). C.
Single, haploid (n) sets of chromosomes in ovum and sperm unite during fertilization, forming a diploid (2n), single-celled zygote. D.
At sexual maturity, ovaries and testes produce diploid gametes by meiosis. E.
Sexual life cycles differ with respect to the relative timing of meiosis and fertilization.
D.
At sexual maturity, ovaries and testes produce diploid gametes by meiosis. Which of the following occurs in meiosis but not in mitosis? A.
chromosome replication B.
synapsis of chromosomes C.
production of daughter cells D.
alignment of chromosomes at the equator E.
condensation of chromatin B) synapsis of chromosomes
The somatic cells of a privet shrub each contain 46 chromosomes. To be as different as they are from human cells, which have the same number of chromosomes, which of the following must be true? A.
Privet cells cannot reproduce sexually. B.
Privet sex cells have chromosomes that can synapse with human chromosomes in the laboratory. C.
Genes of privet chromosomes are significantly different than those in humans. D.
Privet
shrubs must be metabolically more like animals than like other shrubs. E.
Genes on a particular privet chromosome, such as the X, must be on a different human chromosome, such as number 18. C.
Genes of privet chromosomes are significantly different than those in humans. When we see chiasmata under a microscope, that lets us know which of the following has occurred? A.
asexual
reproduction B.
meiosis II C.
anaphase II D.
prophase I E.
separation of homologs D.
prophase I If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of the same cell at metaphase of meiosis I would be A.
0.25x. B.
0.5x. C.
x. D.
2x. E.
4x.
D.
2x. Independent assortment of chromosomes is a result of A.
the random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I. B.
the random nature of the fertilization of ova by sperm. C.
the random distribution of the sister chromatids to the two daughter cells during anaphase II. D.
the relatively small degree of homology
shared by the X and Y chromosomes. E.
the random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I, the random nature of the fertilization of ova by sperm, the random distribution of the sister chromatids to the two daughter cells during anaphase II, and the relatively small degree of homology shared by the X and Y chromosomes. A.
the random and independent way in which each
pair of homologous chromosomes lines up at the metaphase plate during meiosis I. When homologous chromosomes crossover, what occurs? A.
Two chromatids get tangled, resulting in one re-sequencing its DNA. B.
Two sister chromatids exchange identical pieces of DNA. C.
Specific proteins break the two strands and re-join them with their homologs. D.
Each of the four DNA strands of a tetrad is broken and the pieces
are mixed. E.
Maternal alleles are "corrected" to be like paternal alleles and vice versa. C.
Specific proteins break the two strands and re-join them with their homologs Which of the following defines a genome? A.
representation of a complete set of a cell's polypeptides B.
the complete set of an organism's polypeptides C.
the complete set of a species'
polypeptides D.
a karyotype E.
the complete set of an organism's genes E.
the complete set of an organism's genes Mendel accounted for the observation that traits which had disappeared in the F1 generation reappeared in the F2 generation by proposing that A.
new mutations were frequently generated in the F2 progeny, "reinventing" traits that had been lost in the F1. B.
the mechanism controlling the appearance of traits was different between the F1 and the F2 plants. C.
traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1. D.
the traits were lost in the F1 due to dominance of the parental traits. E.
members of the F1 generation had only one allele for each trait, but members of the F2 had two alleles for each trait. C.
traits
can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1.
How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to?
A- The cells produced at the end of meosis cell division have half the number of chromosomes (termed as Haploid), so they will have half the number of chromosomes but same DNA as that of the parent cell as DNA divides and makes a copy of the parent cell DNA.
How do cells at the completion of meiosis compare with cells that have replicated their DNA and just about to begin Meisois?
How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis? They have twice the amount of cytoplasm and half the amount of DNA. They have half the number of chromosomes and half the amount of DNA.
How does DNA replication compare between meiosis and mitosis?
The essential difference between mitotic and meiotic replication is that a single DNA duplication step is followed by only one cell division in mitosis but two cell divisions in meiosis (four daughter cells). Consequently, daughter cells contain only half of the chromosome content of parent cells.
How do the resulting cells of meiosis compare to each other genetically?
The resulting cells from meiosis are not genetically identical because of the recombination of genes that occurred during prophase 1. Sex cells in humans are produced by meiosis. In males, all four child cells are sperms while in females, one child cell is an egg and the other 3 are polar bodies.
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