Stages of Mitosis
What is the first stage of mitosis where the chromosomes condense and become visible?
prophase
Define asexual reproduction.
generates offspring that are genetically identical to a single parent
Bacteria and many protozoa can reproduce this way – separating into two or more individuals approximately the same size. What is it called?
binary fission
artificial selection
Which of the following is an example of selective breeding?
A. populations of lizards that have a certain trait become more numerous after a change in climate
B. A population of insects develop resistance to a pesticide after farmers repeatedly use the same pesticides to ill the insects
C. A population of bacteria develops resistance to an antibiotic
D. farmers allow only sheep that produces the best wool to breed.
D
During which stage of mitosis do sister chromatids separate and move towards opposite poles of the cell?
Fertilization is an example of asexual or sexual reproduction?
sexual reproduction
What is a form of asexual reproduction where new individuals form as offshoots of a parent? Think of the Hydra
budding
desired (wanted) traits
All of the following statements are reasons for selective breeding except
A. To produce offspring with desirable characteristics
B. Farmers increase their profit by improving crops
C. To improve the quality of food products
D. To Increase migration patterns.
D
What happens during the metaphase stage of mitosis?
(Spindle fibers) line up chromosomes in the middle/center of the cell.
What process, Mitosis or Meiosis is sexual reproduction?
meiosis
____________results when an organism’s body is broken into several pieces and each piece grows into a new organism.
regeneration/fragmentation
Which is not a a result of selective breeding?
A. large seedless watermelons that consumer demanded
B.Bright oranges that are all about the same size.
C. An insect that matches the color of the environment
D. A dog that has been bred to have short hair
C- an insect that matches the color of the environment would be a product of natural selection
Problems with animals that are selectively bred include:
A. being more disease resistant
B. producing more meat
C. Being more likely to suffer from genetic disease
D. Being more genetically diverse
C
What is the stage of mitosis where the nuclear envelope reforms and the chromosomes decondense?
telophase
Which, Mitosis or Meiosis is Asexual reproduction
mitosis
When a cell has half the number of chromosomes it is _____. When a cell has the full number of chromosomes it is _____.
haploid
diploid
An organism with identical DNA to its parent
Clone
What is the process called when genes are inserted into another organism.
genetic engineering, bioengineering (gene modification)
What stage of mitosis occurs before cytokinesis?
telophase
What are the advantages of asexual reproduction?
Only need one parent.
Faster/Less energy required
What is a disadvantage to asexual reproduction?
Identical offspring respond in the same way to the environment, therefore if there is an environmental change they face extinction.
No variation within species, will not allow for evolution with changing environment.
Same diseases can be transferred to the next generation.
How many chromosomes in a human egg cell?
23
How many chromosomes are in a human skin cell?
46