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Unit 2 8
Terms in this set (28)
1. Animal cells have "counters" that keep track of how many times a cell has divided. These are called what?
What are the two major methods of cellular division in eukaryotic cells?
Interphase - cell grows and develop
Miotic phase - cell division
In most bacteria, the DNA is carried on what structure?
Single circular chromosome closed loop of double stranded DNA
The DNA in linear eukaryotic chromosomes is wrapped around proteins which keep the DNA from getting tangled and enable an orderly, tight, and efficient packing of the DNA inside the cell. The protein s called?
5. In asexual reproduction, daughter cells inherit their DNA from whom?
6. What is cytokinesis?
The cytoplasm is divided into two daughter cells, each of which has a complete set of the parent cell's DNA and other cellular structures.
7. Within interphase, which of the stages is defined by the active replication of the cell's genetic material?
The Gap 1, DNA synthesis, and Gap 2 phases of the cell cycle are collectively called what?
DNA replication occurs during what phase of the cell cycle?
The eukaryotic cell cycle consists of four phases. What are they?
GAP 1, Synthesis, gap 2, Mitosis
GOTTA STAY GETTING MONEY
The division of the cytoplasm during cell division is referred to as?
A Errors sometimes occur when DNA self-duplicates. Why might that be a good thing?
Helps evolution progress past the bad genes.
What is the purpose of mitosis?
The parent cell's nucleus, with its duplicated chromosomes, divides.
What is apoptosis?
the death of cells which occurs as a normaland controlled part of an organism's growth or development.
The rate at which mitosis occurs varies dramatically for different types of cells. The most rapid cell division occurs where?
Mitosis results in what?
Dividing the cells of a parent cell of the DNA in the nucleus
in the nucleus Anaphase of mitosis occurs when?
cell-cycle control mechanisms assess whether the chromosomes have aligned properly at the metaphase plate and whether there is appropriate tension (pull) on them.
A cell is said to have reached the metaphase stage of mitosis when what happens?
the centromeres have arrived at the equatorial plate
Naturally occurring chemicals in plants may be useful in inhibiting cancer. One of these chemicals found in grapes and peanuts is called what?
What important characteristic of cancer cells make them different from other cells?
Don't stop dividing.
The human genome comprises of what?
3billion base pairs of deoxyribonucleic acid (DNA).
What is the difference between haploid and diploid?
Haploid cells are those that have only a single set of chromosomes while diploid cells have two sets of chromosomes.
What is the definition of "female"?
One lacking Y chromosomes
A karyotype of one of your skin cells would reveal a total of 46 chromosomes. How many of these are maternally inherited autosomes?
How many sex chromosomes does the normal human female inherit from her mother?
Down syndrome results from what type of chromosomal abnormality?
extra copy of chromosome #21
What are the characteristic of Turner Syndrome?
Short height Web of skin between neck and shoulders Underdeveloped ovaries; often sterile Some learning difficulties
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