MEIOSIS Homework
Discipline: Biology (and other Life Sciences)
Type of Paper: Question-Answer
Academic Level: Undergrad. (yrs 3-4)
Paper Format: APA
Pages: 1
Words: 275
Question
a)
non-homologous chromosomes. b) sister chromatids. c) homologous
chromosomes. d) centromere. e) nonsister chromatids. f) homologous
chromosomes. g) sister chromatids
Which of the following correctly defines a genome
the complete set of an organism's genes
How are sister chromatids and homologous chromosomes different from each other?
Homologous
chromosomes contain the same gene loci but may have different alleles
of a particular gene. Sister chromatids are identical copies of each
other produced during DNA replication.
One homologous chromosome comes from the father, and the other comes from the mother. Sister chromatids are identical copies of each other.
One homologous chromosome comes from the father, and the other comes from the mother. Sister chromatids are identical copies of each other.
Which of the following is true of a species that has a chromosome number of 2n = 16?
Each cell has 8 homologous pairs.
What is "crossing over?"
an
exchange of corresponding segments between nonsister chromatids of
homologous chromosomes; The result of the exchange of homologous
portions of nonsister chromatids is new combinations of genetic material
(genetic recombination).
What is the best evidence telling you whether this cell is diploid or haploid?
The
cell is diploid because it contains two sets of chromosomes. Only
diploid cells contain two sets of chromosomes, one maternal and one
paternal. Read about diploid cells.
This chromosome has two chromatids, joined at the centromere. What process led to the formation of the two chromatids?
The two chromatids were formed by duplication of a chromosome.
Human gametes are produced by _____.
Meiosis; Meiosis produces haploid gametes from a diploid parental cell.
Normal human gametes carry ____ chromosomes
23. This is the number of chromosomes in a single set of human chromosomes.
Which of these cells is (are) haploid?
C & D. Once meiosis I is completed, cells are haploid.
A diploid organism whose somatic (nonsex) cells each contain 32 chromosomes produces gametes containing _____ chromosomes
16; because it is half of 32.
How is meiosis different from mitosis?
Meiosis has two divisions resulting in 4 haploid cells, whereas mitosis has one division resulting in 2 diploid cells identical to the parent cell.
The number of cells produced is different.
The number of cells produced is different.
Which of the following is true for both mitosis and meiosis?
Sister chromatids are eventually separated.
Your dog has puppies. A pair of homologous chromosomes inside a puppy’s cell
will have the same genes at the same locations
When, precisely, in the life cycle of a sexually reproducing organism does the transition from diploid to haploid occur?
Meiosis I
When in the life cycle of a sexually reproducing organism does the transition from haploid to diploid most precisely occur?
Fertilization
The original source of all genetic variation is
mutation.
Which of the following contribute(s) to the variation in offspring produced by sexual reproduction?
Crossing over
Mutation Independent assortment Random fertilization
Mutation Independent assortment Random fertilization
If
an organism has a diploid number of 6 chromosomes, how many different
combinations of maternal and paternal chromosomes are possible in its
gametes?
8 because there are 3 haploid, 2^3 = 8
Which of the following lists the processes involved in Meiosis in the correct order?
DNA replication → Separation of homologous chromosomes → Cell division → Separation of sister chromatids → Cell division
Human
skin cells typically have 46 chromosomes. A human skin cell in G2 phase
has ___________ chromosomes, ____________ chromatids, and
______________ DNA molecules.
46, 92, 92