Zygote

Science / Marine Biology / Zygote: A fertilized egg. Or the diploid cell that results from the joining of two haploid gametes (sperm and egg) during sexual reproduction, that will cleave to form an embryo. See also fertilization, gamete.

Homozygote

Science / Genetics / Homozygote: Having identical alleles at one or more loci in homologous chromosome segments. MORE

Heterozygote

Science / Genetics / Heterozygote: Having two alleles that are different for a given gene. MORE

Asexual Reproduction

Science / Biology / Asexual Reproduction: A method of reproduction in which genetically identical offspring are produced from a single parent; occurs by many mechanisms, including fission, budding, and fragmentation. MORE

Identical Twin

Science / Genetics / Identical Twin: Twins produced by the division of a single zygote: both have identical genotypes. MORE

Overdominance

Science / Marine Biology / Overdominance: Selection favoring heterozygotes MORE

Larva

Science / Biology / Larva: A stage in the development of many insects and other organisms including sea urchins and sponges. In sponges, sexual reproduction results in the production of motile ciliated larvae. MORE

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