asexual and sexual reproduction 4.04

Sexual and Asexual Reproduction

Asexual Reproduction – One Asexual Reproduction – One parentparent

1. Offspring have identical DNA as parent (clones)

2.Three different types of asexual reproductiona. Binary fission

b. Budding

c. Regeneration

3. Fission – division of an organism into two equal parts (BACTERIA)

BACTERIA

Three types of asexual reproduction

4. Budding – a new organism grows from the body of the parent organism (YEAST)

Yeast budding

Hydra Budding

5. Regeneration – repairing damaged or lost body parts. Sometimes, a new organism will grow from piece of organism

Sexual Reproduction – 2 Sexual Reproduction – 2 parentsparents

1. Offspring are different from parents

2. Use sex cells - gametes:a. Sperm cell – male, small, mobile

b. Egg cell – female, large, free floating, contain food for new organism

3. Fertilization = Joining of the egg and sperm

a. Egg and sperm are haploid cells = half number of chromosomes (23 chromosomes)

b. Join together (23 chromosomes = 23 chromosomes) to create diploid cell.