Flashcards in Ch 18 Practice Deck (27)
Diring which stage of cell division foes the nucleus divide?
The DNA of a cell is organized into ______.
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?
During ______ I of meiosis homologous pairs of chromosomes align along the equator (center) of the spindle.
A normal human with 22 pairs of autosomes and the sex chromosomes X and Y will be:
______ I is the first phase of meiosis.
During human gametogenesis, spermatogenesis produces ______, while oogenesis produces ______.
Haploid sperm; haploid eggs
The purpose of ______ is to produce two, identical daughter cells.
List the cells of spermatogenesis in the order that they are produced.
1. Primary spermatocyte
2. Secondary spermatocyte
During which phase of the cell does DNA replicate to form sister chromatids?
Place the events and cells produced during oogenesis in the correct sequence.
1. Primary oocyte
2. Secondary oocyte
4. Fusion of egg and sperm nuclei forming a zygote
______ is programmed cell death.
A ______ is the attachment point of two sister chromatids.
Gametes fuse during fertilization to form a ______.
Binary fission is a form of ______ reproduction.
List the phases of interphase in the correct sequence.
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 ______.
If an egg with 24 chromosomes is fertilized by a normal sperm with 23 chromosomes the result is a ______.
Paired chromosomes in a cell in which members of the pair have genes for the same traits are called ______.
List the events of cell cycle control in the correct sequence.
1. Growth factor binds to membrane receptor
2. Receptor relays a signal to proteins in the cytoplasm of the cell
3. Cytoplasmic protein activates specific genes
4. 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.
A picture of a person's chromosomes (shown) that are arranged in pairs and that is used to detect genetic abnormalities is called a ______.
A cell is considered ______ if two of each type of chromosome are present inside the cell.