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Learning Task 4
Direction: Define the following words

1. Meiosis
2. Leptotene
3. Zygotene
4. Diplolene
5. Diakinesis
6. Piophase
7. Metaphase
8. Anaphase
9. Telophase
10. Haploid

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1. Meiosis - a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.

2. Leptotene - the first stage of the prophase of meiosis, during which each chromosome becomes visible as two fine threads (chromatids).

3. Zygotene -the second stage of the prophase of meiosis, following leptotene, during which homologous chromosomes begin to pair.

4. Diplolene - a stage of meiotic prophase which follows the pachytene and during which the paired homologous chromosomes begin to separate and chiasmata become visible.

5. Diakinesis - the fifth and last stage of the prophase of meiosis, following diplotene, when the separation of homologous chromosomes is complete and crossing over has occurred.

6. Piophase - the first stage of cell division, before metaphase, during which the chromosomes become visible as paired chromatids and the nuclear envelope disappears. The first prophase of meiosis includes the reduction division.

7. Metaphase - the second stage of cell division, between prophase and anaphase, during which the chromosomes become attached to the spindle fibers.

8. Anaphase - the stage of meiotic or mitotic cell division in which the chromosomes move away from one another to opposite poles of the spindle.

9. Telophase - the final phase of cell division, between anaphase and interphase, in which the chromatids or chromosomes move to opposite ends of the cell and two nuclei are formed.

10. Haploid - a cell that contains a single set of chromosomes. The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes.

Explanation:

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BRETCHELPUROLIN BRETCHELPUROLIN · Answer 2

Answer:

1. Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms used to produce the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each chromosome

2. The leptotene stage, also known as the leptonema, is the first of five substages of prophase I in meiosis. The term leptonema derives from Greek words meaning "thin threads". A cell destined to become a gamete enters the leptotene stage after its chromosomes are duplicated during interphase.

3. the zygotene, also known as the zygonema, from Greek word meaning "paired threads"

Zygotene, occurs as chromosomes approximately line up with each other into homologous chromosomes

the combined homologous chromosomes are said to be bivalent

4. Diplolene is a stage of meiotic prophase which follows the pachytene and during which the paired homologous chromosomes begin to separate and chiasmata become visible.

5. Diakinesis the final stage of the prophase of meiosis, during which homologous chromosomes start to separate after crossing over.

6. Prophase is the first stage of cell division in both mitosis and meiosis. Beginning after interphase, DNA has already been replicated when the cell enters prophase. The main occurrences in prophase are the condensation of the chromatin reticulum and the disappearance of the nucleolus.

7. Metaphase is the third phase of mitosis, the process that separates duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. ... Long protein filaments called kinetochore microtubules extended from poles on either end of the cell and attached to the kinetochores.

8. Anaphase, is the stage of mitosis after the process of metaphase, when replicated chromosomes are split and the newly-copied chromosomes are moved to opposite poles of the cell.

9. Telophase is the fifth and final phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. ... During telophase, a nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm.

10. Haploid describes a cell that contains a single set of chromosomes. The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. Gametes contain half the chromosomes contained in normal diploid cells of the body, which are also known as somatic cells.