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Children's Dictionary
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breed to give birth to or produce offspring. [1/4 definitions]
breeding the act or process of producing offspring. [1/2 definitions]
chromosome a part found in the cells of all plants and animals. Chromosomes contain genes which pass on physical characteristics from parent to offspring.
cub the young offspring of some carnivorous mammals, such as the bear, lion, and wolf.
DNA a substance found in cells that contains information about the characteristics of a living thing. DNA plays a part in the passing on of characteristics from parent to offspring. "DNA" is an abbreviation of "deoxyribonucleic acid."
fertile producing or able to produce young, seeds, fruit, eggs, or other offspring. [1/3 definitions]
gene a tiny section of a chromosome. A gene causes a particular characteristic, such as eye color or hair color, to be passed on from parent to offspring.
genetics (used with a singular verb) the science that studies how characteristics are passed on from parent to offspring. Genetics is concerned with the influence of genes on the appearance, development, and evolution of plants and animals.
hereditary having to do with characteristics that are passed or could be passed from parent to offspring. [1/2 definitions]
heredity the passing of characteristics from parent to offspring. [1/2 definitions]
hybrid the offspring of two plants or animals that are of different species or breeds.
male a person or animal of the masculine sex; one that fathers rather than bears offspring. [1/2 definitions]
mate1 one of a pair of animals that live or have offspring together. [2/6 definitions]
mule1 the offspring of a male donkey and a female horse. Mules are as large as horses, with the longer ears of a donkey. Mules cannot produce young. People breed mules to use for riding or for pulling loads. [1/2 definitions]
multiply1 to produce offspring; reproduce. [1/5 definitions]
mutant a life form whose genes are different from those of its parents. A mutant has new traits or characteristics that it can pass on to its offspring.
reproduce to have young or offspring. [1/3 definitions]
reproduction the process by which living things create young or offspring. [1/3 definitions]
udder a large organ with two or more glands, each with its own nipple. Udders are the organs in mammals such as cows and goats from which the offspring drink milk.
young offspring that have been recently born. [1/4 definitions]