SBU Bio-202 Exam 4 Professor Erster Spring 2024
Questions With Complete Solutions
Meiosis
Process in which a diploid nucleus is converted into four haploid
nuclei
Meiosis I
The reduction division because it reduces the chromosome
number from diploid to haploid as the homologous
chromosomes separate from one another
Meiosis II
The second phase of meiosis consisting of chromatids
separating, along with the two diploid cells splitting in two
Prophase I
The chromosomes condense, and the nuclear envelope breaks
down, crossing-over occurs
Chiasmata
Site of crossing over
Telophase I
Cytoplasm divides, 2 daughter cells are formed
Prophase II
A new spindle forms around the chromosomes
,Metaphase II
The duplicated chromosomes move to the center of the cell.
Each centromere attaches to two spindle fibers instead of one
Anaphase II
Sister chromatids separate
Telophase II
Nuclear membrane reforms, cytoplasm divides, 4 daughter cells
formed
Functions of Cell Division
Reproduction, growth and development, tissue renewal
Chromosome
A threadlike structure of nucleic acids and protein found in the
nucleus of most living cells, carrying genetic information in the
form of genes
Mitosis
Part of eukaryotic cell division during which the cell nucleus
divides
How is DNA stored
Chromosomes
Somatic cells have
, 46 chromosomes
Gametes have
23 chromosomes
Sister chromatids
Replicated forms of a chromosome joined together by the
centromere
Centromere
Area where the chromatids of a chromosome are attached
Kinetochore
Protein disk that binds with the mitotic spindles
Cohesin
Holds sister chromatids together at the centromere
Cell cycle
The regular sequence of growth and division that cells undergo
G1
Cell growth
G2 (simple)
Cell prepares to divide
S phase
Questions With Complete Solutions
Meiosis
Process in which a diploid nucleus is converted into four haploid
nuclei
Meiosis I
The reduction division because it reduces the chromosome
number from diploid to haploid as the homologous
chromosomes separate from one another
Meiosis II
The second phase of meiosis consisting of chromatids
separating, along with the two diploid cells splitting in two
Prophase I
The chromosomes condense, and the nuclear envelope breaks
down, crossing-over occurs
Chiasmata
Site of crossing over
Telophase I
Cytoplasm divides, 2 daughter cells are formed
Prophase II
A new spindle forms around the chromosomes
,Metaphase II
The duplicated chromosomes move to the center of the cell.
Each centromere attaches to two spindle fibers instead of one
Anaphase II
Sister chromatids separate
Telophase II
Nuclear membrane reforms, cytoplasm divides, 4 daughter cells
formed
Functions of Cell Division
Reproduction, growth and development, tissue renewal
Chromosome
A threadlike structure of nucleic acids and protein found in the
nucleus of most living cells, carrying genetic information in the
form of genes
Mitosis
Part of eukaryotic cell division during which the cell nucleus
divides
How is DNA stored
Chromosomes
Somatic cells have
, 46 chromosomes
Gametes have
23 chromosomes
Sister chromatids
Replicated forms of a chromosome joined together by the
centromere
Centromere
Area where the chromatids of a chromosome are attached
Kinetochore
Protein disk that binds with the mitotic spindles
Cohesin
Holds sister chromatids together at the centromere
Cell cycle
The regular sequence of growth and division that cells undergo
G1
Cell growth
G2 (simple)
Cell prepares to divide
S phase
