WorksheetsAP Bio - Unit 5 - Meiosis Pretest/Post test
Total questions: 39
Worksheet time: 35mins
Meiosis creates genetic variation while mitosis creates identical copies of cells.
True
False
Meiosis happens in which of the following cells?
Skin epithelial cell
Macrophage
Germ cell producing an egg or sperm
Stem cells
Item 5 in the diagram represents _____
S phase
Meiosis
Fertilization
Mitosis
Item 3 in the diagram represents _____
S phase
Meiosis
Fertilization
Mitosis
Item 2a in the diagram represents _____
Ovaries
Testes
Fertilization
Mitosis
This cell is in which stage of meiosis?
Prophase I
Anaphase II
Metaphase I
Anaphase I
This cell is in which stage of meiosis?
Prophase I
Anaphase II
Metaphase I
Anaphase I
In which phase does crossing over occur?
Prophase I
Metaphase II
Prophase II
Metaphase I
A cell has 6 homologous pairs of chromosomes. What is the possible number of genetic recombinations in the gametes?
16
32
64
128
If an organism is diploid & a certain gene found in the organism has 18 known alleles, then any given organism of that species can/must have which of the following?
2 alleles for that gene (at most)
18 chromosomes for that gene
18 alleles for that trait
up to 18 genes for that trait
Which of the following is true of a species that has a chromosome number of 2n = 20?
The species has 20 sets of chromosomes per cell.
Has 10 pairs of chromosomes per cell
Has 40 separate chromosomes after S phase
Gamete has 20 chromosomes
The karyotype of one species of primate has 48 chromosomes. In a particular female, cell division malfunctions, and she produces one of her eggs with an extra chromosome (25). The most probable source of this error would be a mistake in which of the following?
either anaphase I or II
telophase I
mitosis in her ovary
metaphase II
After telophase I of meiosis, the chromosomal makeup of each daughter cell is
diploid, and the chromosomes are each composed of two chromatids.
haploid, and the chromosomes are each composed of a single chromatid.
haploid, & the chromosomes are each composed of two chromatids.
None of these
How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis?
half the amount of cytoplasm and twice the amount of DNA.
half the number of chromosomes and one-fourth the amount of DNA.
half the number of chromosomes and half the amount of DNA.
same number of chromosomes and half the amount of DNA.
Sister chromatids separate in which phase?
Metaphase I
Anaphase II
Prophase II
Anaphase I
Homologous chromosomes separate in which phase?
Metaphase I
Anaphase II
Prophase II
Anaphase I
Chiasmata form during which stage?
Prophase I
Prophase II
Metaphase I
Metaphase II
The random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I is due to ___.
Crossing over
Random fertilization
Independent assortment
Mitosis
Which life cycle is typical for animals?
I only
II only
I and II
I and III
Which of the life cycles is (are) typical for plants and some algae?
I only
II only
I and II
III only
Genetic variation can increase as a result of which of the following processes (select all that apply)
Crossing over
Conjugation
Fertilization
Binary fission
Meiosis results in ______.
4 genetically unique haploid gametes
4 genetically unique diploid cells
2 genetically identical cells
4 genetically identical cells
If a stem cell (body cell) has 24 chromosomes, how many will it have at the end of meiosis?
24
12
6
the number varies per species
What is one of the advantages of reproducing sexually versus asexually?
underproduction of offspring
overproduction of offspring
genetic variation
artificial selection
The organelle located within centrosome region of animal cells; aids in spindle fiber formation
Chromatid
Centriole
Centromere
Centrosome
In frogs there are 26 chromosomes in a fertilized egg. Which best describes how many chromosomes are in the egg and sperm cells before fertilization?
26 chromosomes in the egg cell and 26 chromosomes in the sperm cell
13 chromosomes in the egg cell and 13 chromosomes in the sperm cell
52 chromosomes in the egg cell and 52 chromosomes in the sperm cell
26 chromosomes in the egg cell and 0 chromosomes in the sperm cell
If an organism reproduces asexually, as in budding, its offspring will most likely be:
genetically different from each other.
produced from specialized cells known as egg and sperm.
genetically identical to the parent
produced as a result of fertilization.
How do mitosis and meiosis differ?
Meiosis produces 2 identical cells, while mitosis produces 4 identical cells.
Mitosis produces 2 identical cells, while meiosis produces 4 different cells.
Mitosis produces 4 different cells, while meiosis produces 2 identical cells.
Meiosis produces only 1 cell, while mitosis produces many.
Cows have 60 chromosomes. A calf received one set of chromosomes from its mother and another set of chromosomes from its father. How many chromosomes did each parent contribute?
Mom and dad each gave 60 chromosomes.
Mom and dad each gave 30 chromosomes.
If the calf looks more like the mom, she gave 40 chromosomes.
If the calf looks more like the dad, he gave 40 chromosomes.
Which of these steps is S phase of cell cycle?
Step 1
Step 2
Step 3
None
A human cell containing 22 autosomes and a Y chromosome is
Sperm
Egg
somatic cell
