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Reproduction, Inheritance, and Meiosis
Terms in this set (22)
a single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission
An organism in the earliest stage of development
the state of being male or female (typically used with reference to social and cultural differences rather than biological ones)
Major source of genetic variation among organisms caused by reassortment or crossing over during meiosis
Chemical messengers that are manufactured by the endocrine glands, travel through the bloodstream, and affect other tissues
Animals that have hair and produce milk for their young
Cell division that produces reproductive cells in sexually reproducing organisms
A primary mechanism of homeostasis, whereby a change in a physiological variable triggers a response that counteracts the initial change.
A structure containing egg cells; the base of a pistil in a flower
fertilize by transfering pollen
A physiological control mechanism in which a change in some variable triggers mechanisms that amplify the change.
have offspring or young
Male sex cell
A reproductive cell with a hard, protective coating
An organism's genetic makeup, or allele combinations.
An organism's physical appearance, or visible traits.
of a cell or organism having two sets of chromosomes or twice the haploid number
An organism or cell having only one complete set of chromosomes
Describes a trait that covers over, or dominates, another form of that trait.
An allele that is masked when a dominant allele is present
A characteristic that an organism can pass on to its offspring through its genes.
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