Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
28 Cards in this Set
- Front
- Back
Which of the following describes why or how recombinant chromosomes add to genetic variability? |
Genetic material from two parents is combined on the same chromosome. |
|
Meiosis II is similar to mitosis because |
Sister chromatids separate |
|
Homologous chromosomes synapse during the S phase of meiosis. |
False |
|
Homologous chromosomes behave independently in mitosis. |
True |
|
Homologous chromosomes travel together to the metaphase plate during meiosis I. |
True |
|
Crossing over between nonsister chromatids of homologous chromosomes is indicated by the presence of chiasmata. |
True |
|
Each parent contributes one set of homologous chromosomes to an offspring. |
True |
|
Cell in prophase I is not considered to be a haploid cell. |
True |
|
If meiosis did not occur in sexually reproducing organisms, then |
chromosome number would double in each generation. |
|
How many chromosomes and how many chromatids are present in a haploid cell during metaphase if a diploid cell from the organism has 48 chromosomes during G1? |
24 and 48
|
|
A cell in G2 before meiosis compared with one of the four cells produced by that meiotic division has |
four times as much DNA and twice as many chromosomes. |
|
What are autosomes? |
1. any chromosome that is not a sex chromosome. |
|
The DNA content of a diploid cell is measured in the G1 phase. After meiosis I, the DNA content of one of the two cells produced would be |
equal to that of the G1 cell. |
|
Which of the following is a major difference between mitosis and meiosis? |
Homologous chromosomes associate only in meiosis. |
|
Most human somatic cells are |
Diploid |
|
What is a karyotype? |
a pictorial display of an individual's chromosomes |
|
How many chromatids are present in metaphase II in a cell undergoing meiosis from an organism in which 2n = 24? |
24 |
|
Pairs of homologous chromosomes |
have genes for the same traits at the same loci. |
|
What is a major difference between mitosis and meiosis? |
Homologous chromosomes associate only in meiosis. |
|
Why is there no duplication of the DNA between meiosis I and meiosis II? |
To reduce the chromosome number to haploid in the resulting daughter cells |
|
How does prophase I differ from prophase II? |
During prophase I there is one diploid cell; during prophase II there are two haploid cells. |
|
Asexual reproduction of a diploid organism would |
produce identical offspring. |
|
The restoration of the diploid chromosome number after halving in meiosis is due to |
fertilization |
|
Homologous and Homologs refer to structures with similar, but not identical, DNA molecules. |
True |
|
A cell in G2 before meiosis compared with one of the four cells produced by that meiotic division has |
four times as much DNA and twice as many chromosomes |
|
During which stage of meiosis do chromatids separate completely? |
Anaphase II |
|
Each chromatid contains a single linear DNA molecule states the relationship between DNA molecules and chromatids |
True |
|
The DNA content of a diploid cell is measured in the G1 phase. After meiosis I, the DNA content of one of the two cells produced would be |
equal to that of the G1 cell |