BIOL10004 Lecture Notes - Lecture 18: Uterus, Anterior Pituitary, Mitosis
30 Jul 2018
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Production of new individuals from single parent mitotic cell division. Do not need to get 2 individuals together @ same place & time. Offspring genetically identical to parents limits genetic diversity. Replacement for damaged/missing parts of the body. Development of new individual from outgrowths of body wall of parent. Or may remain attached and contribute to formation of a colony. Initiated by mitosis of haploid egg cell. 2 nuclei produced fused to form a diploid nuclei & egg develops like it has been fertilised. Done in suitable conditions drastically increases population. When conditions are tougher sexually reproduce to increase genetic variation. Do not produce eggs & sperm at same time. Barramundi start as a boy, get bigger, turn into a female. Indirect development: one or more intermediate larval forms. Direct development: offspring hatch/ born in miniature form. Placenta: specialised organ facilitates nutrient exchange. Must be affordable in terms of future reproductive success.
