Ch 18 Practice Flashcards
Diring which stage of cell division foes the nucleus divide?
Mitosis
The DNA of a cell is organized into ______.
Chromosomes
A cell with a 20 diploid number of chromosomes will have how many after meiosis?
10; meiosis is a reduction division
What is the sequence of the 4 stages of mitosis?
- Prophase
- Metaphase
- Anaphase
- Telophase
During ______ I of meiosis homologous pairs of chromosomes align along the equator (center) of the spindle.
Metaphase
A normal human with 22 pairs of autosomes and the sex chromosomes X and Y will be:
Male
______ I is the first phase of meiosis.
Prophase
During human gametogenesis, spermatogenesis produces ______, while oogenesis produces ______.
Haploid sperm; haploid eggs
The purpose of ______ is to produce two, identical daughter cells.
Mitosis
List the cells of spermatogenesis in the order that they are produced.
- Primary spermatocyte
- Secondary spermatocyte
- Spermatids
- Sperm
During which phase of the cell does DNA replicate to form sister chromatids?
S phase
Place the events and cells produced during oogenesis in the correct sequence.
- Primary oocyte
- Secondary oocyte
- Fertilization
- Fusion of egg and sperm nuclei forming a zygote
______ is programmed cell death.
Apoptosis
A ______ is the attachment point of two sister chromatids.
Centromere
Gametes fuse during fertilization to form a ______.
Diploid zygote
Binary fission is a form of ______ reproduction.
Asexual
List the phases of interphase in the correct sequence.
- G1
- S
- G2
What is a Barr body?
An inactive X chromosome
If an egg with 22 chromosomes is fertilized by a normal sperm with 23 chromosomes the resultant zygote is called a ______.
Monosomy
If an egg with 24 chromosomes is fertilized by a normal sperm with 23 chromosomes the result is a ______.
Trisomy
Paired chromosomes in a cell in which members of the pair have genes for the same traits are called ______.
Homologous chromosomes
List the events of cell cycle control in the correct sequence.
- Growth factor binds to membrane receptor
- Receptor relays a signal to proteins in the cytoplasm of the cell
- Cytoplasmic protein activates specific genes
- Cell cycle is either inhibited or activated depending on the original signal
List characteristics of Turner syndrome:
- Underdeveloped uterus
- Broad chest
- Folds of skin on the neck
- Underdeveloped ovaries
______ is the mitotic phase during which chromosomes are aligned along the center plane (equator) of the cell.
Metaphase
A picture of a person’s chromosomes (shown) that are arranged in pairs and that is used to detect genetic abnormalities is called a ______.
Karyotype
A cell is considered ______ if two of each type of chromosome are present inside the cell.
Diploid
The division of the cytoplasm that accompanies mitosis and meiosis is called ______.
Cytokinesis
