Meiosis Homework
A cell with a diploid chromosome number of 12 divided two times, producing four cells with six chromosomes each. The process that produced these four cells was most likely
1
Homologous pairs of chromosomes are restored as a result of
1
Which event normally occurs in meiosis but not in mitosis?
1
Which situation is a result of crossing-over during meiosis?
1
In the process of oogenesis in humans, a primary sex cell undergoes divisions that
2
The diagram at the right represents human gametes. Which statement best describes the fertilized egg that would result if this sperm cell and egg cell unite?
2
The picture depicts what phase of meiosis
2
The process indicated by P takes place in both the male and female. This process is known as
2
Which diagram best represents spermatogenesis in humans?
2
Which statement best describes the process of crossing-over?
2
The human egg or sperm contains 92 chromosomes.
23
A difference between gametes produced by oogenesis and gametes produced by spermatogenesis is that gametes by oogenesis
3
A sperm cell of an alligator has 16 chromosomes. What total number of chromosomes normally present in a stomach cell of this alligator?
3
An organism which can successfully reproduce without utilizing the process of meiosis is the
3
Compared to the number of chromosomes in a normal human body cell, the number of chromosomes in a normal human sperm cell is
3
Complex organisms produce sex cells that unite during fertilization, forming a single cell known as
3
In sexually reproducing species, doubling of the chromosome number from generation to generation is prevented by that take place during the process of
3
Sex cells are represented by structures
3
Stage E is produced as a direct result of the process of
3
What stage of meiosis is represented by the picture?
3
A child with Down Syndrome has three copies of chromosome 21. Which statement could be true with regards to this child?
4
After one primary sex cell in a human testis undergoes meiosis, the usual result is
4
The abnormal zygote is most likely the result of
4
The meeting of homologous chromosome pairs in meiosis I is called
4
The normal diploid chromosome number of the house mouse, Mus musculus, is 40. How many pairs of homologous chromosomes would a normal zygote of Mus musculus contain?
4
The process of meiosis is most closely associated with
4
Which diagram best represents oogenesis in humans?
4
Which process is represented in the diagram below?
4
The chromatid holds the individual strands of a chromosome together.
Centromere
Discuss the processes of meiosis and recombination. In your answer be sure to explain:
Chromosomes swap DNA with each other, chromosomes are split in half, gametes are produced, different gene combinations allows for natural selection
State two differences between the cells produced by process 1 and process 3.
Egg and sperm cells have half as many chromosomes as the cells that make up the embryo.
Spermatogenesis results in the formation of one sperm from one meiotic cell division.
Four sperm
Explain why meiosis is necessary for sexual reproduction.
If the cells don't have the proper amount of chromosomes, there would be way too many chromosomes in an organism and it wouldn't look normal.
The egg of the female is much smaller than the sperm.
Larger
State three ways the processes of mitosis and meiosis differ.
Mitosis keeps the number of chromosomes, meiosis makes four cells instead of two, mitosis cells are identical to the parent cell
The egg is able to move under its own power by its flagellum in the human.
Sperm
Spermatogenesis occurs in the prostate gland.
Testis
State why process 2 is necessary in sexual reproduction. Include discussion of changes in chromosome number in your answer.
The egg and sperm need to come together ton make a zygote with the proper amount of chromosomes
Crossing over involves an exchange of chromatid segments between chromosomes.
True
Fertilization occurs when the egg and sperm nuclei fuse and join.
True
Oogenesis is the production of the egg.
True
Oogenesis results in the formation of one egg and three polar bodies from one meiotic division.
True
Sexual reproduction frequently results in much variety among offspring.
True
Sexual reproduction is considered to have evolutionary advantages over asexual reproduction as it provides a great number of variations in the offspring.
True
The coming together of doubled homologous chromosomes in meiosis is called crossing over.
True
The first division of meiosis is when crossing over occurs.
True
While meiosis results in a halving of the chromosome number, the chromosome number is maintained in an organism by the processes of meiosis and fertilization.
True
1 parent
asexual
offspring gets all its genes from one parent
asexual
offspring is a clone of the parent
asexual
2 parents
sexual
offspring gets 1⁄2 of its from each parent
sexual
offspring vary genetically from siblings and parent
sexual
results in greater genetic variation
sexual
