Flashcards in Ch 18 Practice Deck (27)
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1
Diring which stage of cell division foes the nucleus divide?
Mitosis
2
The DNA of a cell is organized into ______.
Chromosomes
3
A cell with a 20 diploid number of chromosomes will have how many after meiosis?
10; meiosis is a reduction division
4
What is the sequence of the 4 stages of mitosis?
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
5
During ______ I of meiosis homologous pairs of chromosomes align along the equator (center) of the spindle.
Metaphase
6
A normal human with 22 pairs of autosomes and the sex chromosomes X and Y will be:
Male
7
______ I is the first phase of meiosis.
Prophase
8
During human gametogenesis, spermatogenesis produces ______, while oogenesis produces ______.
Haploid sperm; haploid eggs
9
The purpose of ______ is to produce two, identical daughter cells.
Mitosis
10
List the cells of spermatogenesis in the order that they are produced.
1. Primary spermatocyte
2. Secondary spermatocyte
3. Spermatids
4. Sperm
11
During which phase of the cell does DNA replicate to form sister chromatids?
S phase
12
Place the events and cells produced during oogenesis in the correct sequence.
1. Primary oocyte
2. Secondary oocyte
3. Fertilization
4. Fusion of egg and sperm nuclei forming a zygote
13
______ is programmed cell death.
Apoptosis
14
A ______ is the attachment point of two sister chromatids.
Centromere
15
Gametes fuse during fertilization to form a ______.
Diploid zygote
16
Binary fission is a form of ______ reproduction.
Asexual
17
List the phases of interphase in the correct sequence.
1. G1
2. S
3. G2
18
What is a Barr body?
An inactive X chromosome
19
If an egg with 22 chromosomes is fertilized by a normal sperm with 23 chromosomes the resultant zygote is called a ______.
Monosomy
20
If an egg with 24 chromosomes is fertilized by a normal sperm with 23 chromosomes the result is a ______.
Trisomy
21
Paired chromosomes in a cell in which members of the pair have genes for the same traits are called ______.
Homologous chromosomes
22
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
23
List characteristics of Turner syndrome:
• Underdeveloped uterus
• Broad chest
• Folds of skin on the neck
• Underdeveloped ovaries
24
______ is the mitotic phase during which chromosomes are aligned along the center plane (equator) of the cell.
Metaphase
25
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
26
A cell is considered ______ if two of each type of chromosome are present inside the cell.
Diploid
27
