Sexual reproduction.
The opposite, in which only one parent is needed, is asexual reproduction.
A male parent must fertilize the egg or eggs of a female in order to get offspring. Fertilization may take place sexually of asexually.
Budding
Asexual reproduction requires only one parent with one set of genes, produces a large amount of offspring at one time, and all offspring are genetically identical to the parent. Sexual reproduction requires two parents with two different sets of genes, produces few offspring at one time, and each offspring is genetically unique from the parents.
Generally, in sexual reproduction, two parents make offspring.
In sexual reproduction, an organism inherits its chromosomes from both parents. Each parent contributes half of the total number of chromosomes required for the offspring. These chromosomes contain the genetic information necessary for the development and characteristics of the organism.
Asexual: the offspring has a single parent.Sexual: the offspring has two parents (combining some chromosomes from each parent). In asexual reproduction, as long as there are no mutations, the offspring are identical to the parents; in sexual reproduction, they are not.
The passing on of characteristics from parents to offspring is known as heredity. Some characteristics include hair or eye color, dimples and freckles.
Offspring formed by sexual reproductions use both parents' genetic material that differs from the parents. Offspring formed by asexual reproduction is formed by a single parent and is identical to the parent.
Sexual reproduction produces offspring similar to parents. Asexual reproduction causes the offspring to be exactly the same as the one parent.
genes that we get from our parents that are passed down to the offspring.
The offspring has half of each of their parents' gene
form offspring similar to parents in the animal cell