Differences between self fertilization and cross fertilization is :- self-fertilisation – It involves the formation and fusion of male and female gametes which are derived from same parent whereas cross-fertilisation – It involves the fusion of two gametes produced by different parents. Self fertilization is also known as endogamy and it is very rare process found in Taenia solium whereas cross fertilization is also known as exogamy and it is found in cockroach,frog, human beings etc and it is more common.
Self fertilization is found in Taenia solium Species, in which male and female gametes develop in one gonad in mature proglottid. Taenia solium is human parasite live in intestine, their body posses head, neck and made of various segment known as proglottid. Their body segment is divided into imature proglottid near neck, and in middle mature proglottid bearing male and female sex organ mature at same time and causing fusion of gametes to form diploid zygote. Zygote develops into embryo and mature proglottid change into gravid proglottid and detached from parents body and egested outside from body with faecal matter.
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Earthworm is also bisexual animal, but there male and female gametes develop in different gonads of same parent which mature at different time so self fertilization is not possible in earthworm although it is bisexual animal.
Differences between self fertilization and cross fertilization are given the following table
★ Self fertilization:-
1) it is also known as endogamy
2) male and female gametes are formed in one gonads of same parent and mature at same time
3) it is uniparental fertilization
4) it is very rare process
5) it is found in Species Taenia solium
6) fusing gametes derived from same parents
7) loss of biological fitness and genetic variability.
★ Cross fertilization:-
1) it is also known as exogamy
2) male and female gametes are formed in different gonad of same parents or may be different parents, same parent in case of Earthworm and leech and different parents in cockroach, frog and human beings.
3) it is biparental type of fertilization in which two parents are involved
4) it is very common type of fertilization
5) it is found in a species bisexual animal like Earthworm and leech, unisexual animal like cockroach, frog and human beings
6) fusing gametes derived from different parents
7) its biological fitness is high and shows genetic variability.