Human somatic cells (most body cells) are diploid. Each somatic cell has two sets of 23 chromosomes, making a total of 46.
answer
...
question
A special kind of cell division called meiosis occurs in the ovaries and testes, producing haploid gametes-- eggs and sperm-- that carry only one set of 23 chromosomes each. Fertilization of an egg by a sperm combines two sets of chromosomes, producing a diploid zygote with 46 chromosomes.
answer
...
question
Meiosis produces haploid gametes, and fertilization produces diploid organisms.
answer
...
question
Human gametes are produced by _____.
answer
Meiosis
question
Normal human gametes carry _____ chromosomes.
answer
23
question
Asexual reproduction _____.
answer
produces offspring genetically identical to the parent
question
What number and types of chromosomes are found in a human somatic cell?
answer
44 autosomes and 2 sex chromosomes
question
For what purpose(s) might a karyotype be prepared?
answer
For prenatal screening, to determine if a fetus has the correct number of chromosomes, to determine whether a fetus is male or female and to detect the possible presence of chromosomal abnormalities such as deletions, inversions, or translocations
question
In alternation of generations, what is the diploid stage of a plant that follows fertilization called?
answer
sporophyte
question
How are sister chromatids and homologous chromosomes different from each other?
answer
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.
question
Mitosis results in the formation of how many cells; meiosis results in the formation of how many cells?
answer
two diploid cells ... four haploid cells
question
Which of the following occurs during meiosis but not during mitosis?
answer
synapsis
- The side-by-side association of homologous paternal and maternal chromosomes during the first prophase of meiosis.
question
What is crossing over?
answer
the exchange of homologous portions of nonsister chromatids
question
Genetic variation occurs when chromosomes are shuffled in fertilization and what other process?
answer
Meiosis
- During meiosis 1 crossing over occurs among homologous chromosomes where DNA is exchanged between the chromosomes which is a cause of genetic variation.
question
Meiosis I produces _____ cells, each of which is _____.
answer
two ... haploid
question
Meiosis II typically produces _____ cells, each of which is _____.
answer
four ... haploid
question
During _____ sister chromatids separate.
answer
anaphase II
question
At the end of _____ and cytokinesis, haploid cells contain chromosomes that each consist of two sister chromatids.
answer
telophase I
question
Synapsis occurs during _____.
answer
Prophase I
question
Homologous chromosomes migrate to opposite poles during _____.
answer
anaphase I
question
During _____ chromosomes align single file along the equator of a haploid cell.
answer
metaphase II
question
At the end of _____ and cytokinesis there are four haploid cells.
answer
telophase II
question
During _____ a spindle forms in a haploid cell.
answer
anaphase II
question
Two sister chromatids are joined at the centromere prior to meiosis. Which statement is correct?
answer
Barring mutation, the two sister chromatids must be identical.
Haven't found what you need?
Search for quizzes and test answers now
Quizzes.studymoose.com uses cookies. By continuing you agree to our cookie policy
