Latex
The colorless or milky sap of certain trees and plants, such as the milkweed and the rubber
tree, that hardens when exposed to the air. Latex usually contains gum resins, waxes, and
oils, and sometimes toxic substabces.
Law of independent assortment
Mendel's second law, stating that each allele pair segregates independently during gamete
formation; applies when genes for two traits are located on different pairs of homologous
chromosomes.
Law of segregation
Mendel's first law, stating that allele pairs separate during gamete formation, and then
randomly re-form pairs during the fusion of gametes at fertilization.
Leaching
The dissolving of minerals and other elements in soil or rocks by the downward movement
of water.
Leading strand
The new continuous complementary DNA strand synthesized along the template strand in
the mandatory 5' to 3' direction.
Leaf
The main site of photosynthesis in a plant; consists of a flattened blade and a stalk (petiole)
that joins the leaf to the stem.
Leaping
The act of leaping; a jump.
Learning
The process that leads to modification in individual behavior as the result of experience.
Left atrium
The left upper chamber of the heart that receives blood from the pulmonary veins.
Leptotene
The first stage of the prophase of meiosis.
Leukocyte
A white blood cell; typically functions in immunity, such as phagocytosis or antibody
production.
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