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Description
Flashcards by Noor Haider, updated more than 1 year ago
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Created by Noor Haider
over 6 years ago
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| Question | Answer |
| What is a zygote ? | The cell formed by the fusion of two gametes. |
| What is replication? | The process of making copies of DNA. |
| What is the first step of replication? | The strands of the double helix separate from each other. |
| Second step | Nucleotides pair up with bases. |
| Third step | Result is two indentical DNA molecules are formed. |
| What are chromatids? | One of the strands of a chromosome following replication. |
| What is cell division? | When cells divide or replicate when organisms grow. |
| What are the two types of cell division? | Mitosis and meiosis. |
| What is mitosis? | The cell division that produces two daughter cells identical to the parent cell. |
| What is meiosis? | Cell division that produces gametes with half the number of chromosomes of the parent cell. |
| What are the stages of mitosis? | Interphase, prophase, metaphase, anaphase, telophase, cytokinesis. |
| What is the diploid number? | The number of chromosomes in body cells; two sets or 2n. |
| What is the haploid number? | The number of chromosomes in gametes. |
| What are the situations in which cell division by mitosis will occur? | Growth, asexual reproduction, tissue regeneration, tissue culture and engineering, wound and tissue repair. |
| What is asexual reproduction? | When offspring is produced without any union of gametes. |
| What are examples of organisms that reproduce asexually? | Candida, Volvox, Amoeba. |
| What is interphase? | Chromosomes replicate to have two chromatids. |
| What is prophase? | Replicated chromosomes and their chromatids become visible. |
| What is metaphase? | Replicated chromosomes line up along the equator of the cell. |
| What is anaphase? | The chromatids separate and move to opposite poles of the cell. |
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