Question

re 9.2: observe and describe the significance of cellular reproductive processes, including mitosis and meiosis. (18) fill in the following venn diagram to compare and contrast mitosis and meiosis. include as much information as you can. (6 marks) mitosis meiosis

Explanation:

• Mitosis - Unique to Mitosis:
• Produces two daughter cells.
• Daughter cells are diploid (in most somatic cells).
• No crossing - over (except in some rare cases like in some fungi).
• One round of division.
• Used for growth, repair, and asexual reproduction in some organisms.
• Meiosis - Unique to Meiosis:
• Produces four daughter cells.
• Daughter cells are haploid.
• Involves crossing - over (prophase I).
• Two rounds of division (meiosis I and meiosis II).
• Essential for sexual reproduction (produces gametes).
• Common to Both:
• Start with a diploid parent cell (in most cases for mitosis in diploid organisms; meiosis starts with a diploid germ cell).
• Have stages like prophase, metaphase, anaphase, and telophase (although meiosis has two sets of these stages).
• DNA replication occurs before the start of the division process (during interphase).

Answer:

• Mitosis (Unique): Two diploid daughter cells, one - division cycle, for growth/repair/asexual reproduction (in some), no crossing - over (mostly).
• Meiosis (Unique): Four haploid daughter cells, two - division cycles (meiosis I and II), crossing - over (prophase I), for sexual reproduction (gamete formation).
• Common: Start with diploid cell (usually), DNA replication before division, have prophase/metaphase/anaphase/telophase - like stages.