Objective 3.1

objective 3.1: describe the differences between sexual and asexual reproduction

sexual reproduction:

1. sexually reproducing organisms have 'sexes' and you can determine between male and female.

2. they produce celles called gametes. the male gamete is known as sperm and female gamete as the egg. in plants the male is the pollen grain and the female is the ovule.

3. meiosis produces gametes by cell division halving the chromosome in an adult cell.

4. total number of chromosomes per ordinary cell:46. per gamete (m+f) is 23.

5. . fertilisation is when the egg and sperm fuse.

6. there are broad variations in organism with sexual reprooduction.

asexual reproduction

1.no sexes exist

2. no gametes exist either

3. no miosis, just mitosis and binary fission which cause duplication in the cell not dividing chromosomes.

4. no cell fusion so no fertilisation,

5. there are small variations between organisms due to mutation, otherwise they are identical or clone.

question: why are there 46 chromosomes per ordinary cell? why not any other number?