What are the breeding methods of animals?

Organisms can be divided into sexual reproduction and asexual reproduction.

Sexual reproduction: A fertilized egg must be formed by combining hermaphroditic germ cells (sperm and egg cells) and then develop into a new individual.

Asexual reproduction: A mother without hermaphroditic germ cells gives birth to new individuals.

Several common ways of asexual reproduction:

1, Schizomorpha, paramecium, bacteria

Budding yeast, hydra

3. Penicillium sporogenum, Aspergillus, Chlamydomonas

4. The vegetative propagation of potato stems and strawberry stolons.

In asexual reproduction, the new individual contains the same genetic material as the mother, so the new individual can keep all the characteristics of the mother.

Several common ways of sexual reproduction:

1, conjugation and reproduction, homomorphism and heteromorphism

2. Gametogenesis: Syngamy, Heterogamy and Oogamy.

3. Parthenogenesis

4. Larval reproduction

5. Polyembryo reproduction

Extended data

1. The fundamental difference between asexual reproduction and sexual reproduction is that the former does not need the combination of bisexual germ cells and directly produces new individuals from the mother; The latter will become a zygote through the combination of bisexual germ cells, and the zygote will develop into a new individual.

2. Sexual reproduction has greater vitality and variability than asexual reproduction. From the perspective of evolution, the reproductive mode of organisms is the transition from asexual reproduction to sexual reproduction.

Fission reproduction is the common reproductive mode in single cells; Sexual reproduction is a common reproductive mode in biology; Egg reproduction is a common sexual reproduction mode in higher plants and most animals.

References:

Baidu encyclopedia-animal reproduction