Question
Asked Dec 11, 2019
1 views

Describe the movements of chromosomes during the states of meiosis to produce sperm and eggs?

check_circle

Expert Answer

Step 1

Meiosis is the process mainly used for the production of sex cells like female egg and sperm. In the meiosis process, haploid cells are produced from a diploid cell. Meiosis occurs in special cells called germ cells within the gonads of males and females. The reduction in the number of chromosomes to occur in the new haploid daughter cells. Two rounds of division are necessary these divisions are termed meiosis one and meiosis two.

Step 2

The process of mitosis and meiosis look similar until the beginning of prophase. During prophase 1 when homologous pairs of sister chromatids lie side by side in a process called synapses.

Once this structure formed the second event called crossing over can occur. During crossing over a physical exchange between chromosomes segments of non-sister chromatids occurs increasing genetic diversity. Prophase one concludes with the fragmentation of the nuclear envelope as the duplicated central pairs move to opposite poles of the cell as they move the centrioles extend spindle forming the mitotic spindle.

Step 3

In prometaphase one with the paired centrioles in place, the mitotic spindle is fully formed. The sister chromatids attached to the spindle fibers by their kinetic cores. Homologous chromosomes remain aligned so that a pair of sister chromatids are attached to one pole by kinetochore microtubules.

During metaphase 1 chromosomes randomly aligned along with the metaphase plate. Due to independent assortments, this alignment is random and adds to genetic diversity in anaphase 1 the homologous chromosomes separate and move toward opposite poles.

Meiosis 1 ends with telophase1 when the chromosomes condense and nuclear envelope reform. Cytokinesis separates the cytoplasmic...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Biology

Cell Biology

Related Biology Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: What could be the reason why a woman only gets her period after puberty?

A: At puberty age which is 10 to 14 for girls and boys have 12 to 16 age. So many changes occur in the ...

question_answer

Q: Differential media only allow certain bacteria to grow. True or False ?

A: The culture medium is used to grow different kinds of microorganisms. A culture medium is formed of ...

question_answer

Q: State the function of homeotic genes. Describe how nurse cells in fruit flies can affect larval deve...

A: Homeotic genes are a group of genes that control the pattern of body formation during early embryoni...

question_answer

Q: If there is increased hydrostatic pressure on the venous side of the capillaries leading to an incre...

A: Ankle edema is a condition in which there is swelling in the ankle. This is a result of the entry of...

question_answer

Q: Describe three ways variation can be introduced into offspring produced by sexual reproduction.

A: Sexual reproduction causes greater genetic diversity because the sperm and egg produced contain diff...

question_answer

Q: What is the human genome project and what were its goals and two big surprises?

A: Mapping and sequencing the human genome will result in new information and materials of potential co...

question_answer

Q: What are the similarities between DNA and RNA, in detail.

A: DNA stands for deoxyribonucleic acid. It is a genetic material that passes from one generation to th...

question_answer

Q: Provide an overview of the cell signaling process.

A: Cell signalling forms a part of a communication process that co-ordinates multiple actions of the ce...

question_answer

Q: Neonatal meningitis is almost always a result of an infection transmitted by the mother, either in u...

A: Meningitis is described as the infection and inflammation of the meninges. They are the protective m...