Many organisms spend most of their life cycle in the diploid state. If meiosis produces haploid cells, how is the diploid number restored for these types of organisms? (A) by DNA replication (B) through the transcription of DNA to RNA (C) by synapsis of the homologous pairs of chromosomes during prophase of meiosis I (D) by fertilization



Answer :

Many organisms spend most of their life cycle in the diploid state. If meiosis produces haploid cells, then the diploid number is restored for these types of organisms  (D) by fertilization.

During sexual reproduction, sex cells or gametes produced by two parents unite by the process of fertilization, resulting in the creation of a new, genetically unique individual.

Meiosis involves the formation of haploid cells (gametes) from the diploid ones (somatic cells), whereas, fertilization involves the fusion of haploid gametes to produce a diploid cell (the zygote).

Almost all animals exhibit a diploid-dominant life cycle in which gametes are the only haploid cells.

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