Science / Biology / Diploid: Cells that contain homologous chromosomes. The number of chromosomes in the cells is the diploid number and is equal to 2n (n is the number of homologous pairs).


Science / Biology / Meiosis: Cell division in which the chromosomes replicate, followed by two nuclear divisions. Each of the resulting gametes (in animals, spores in plants) receives a haploid set of chromosomes. Reduction/divis MORE


Science / Chemistry / Homolog: A compound belonging to a series of compounds that differ by a repeating group. For example, propanol (CH3CH2CH2OH), n-butanol (CH3CH2CH2CH2OH), and n-pentanol (CH3CH2CH2CH2CH2OH) are homologs; they b MORE


Science / Genetics / Autosome: A chromosome not involved in sex determination. The diploid human genome consists of 46 chromosomes, 22 pairs of autosomes, and 1 pair of sex chromosomes (the x and y chromosomes). MORE

Genetic Locus

Science / Marine Biology / Genetic Locus: A location on a chromosome (possibly of a diploid organism with variants that segregate according to the rules of Mendelian heredity) MORE


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


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, gamet MORE