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4
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Creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant
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5
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Having dissimilar alleles at corresponding chromosomal loci; 'for eye colour'
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6
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A mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote
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7
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(genetics) attributes acquired via biological heredity from the parents
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9
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A minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins
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10
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A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
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13
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A biologist who specializes in genetics
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14
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The changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or
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15
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Having identical alleles at corresponding chromosomal loci
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1
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A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores
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2
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One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome
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3
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A condition that appears only in individuals who have received two copies of a mutant gene, one copy from each parent. The individuals with a double dose of the mutated gene are called homozygotes. Their parents, each with a single dose of the mutate
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8
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A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth
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11
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The male reproductive cell; the male gamete
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12
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The female reproductive cell in animals and plants; an ovum
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16
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A unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring
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