Often exemplified by the Palomino (pa-
Most traits governed by this principle are the result of haplo- insufficiency, and when production of hexosaminidase A [heks-o-SA-min-ee-dase A] is considered, Tay-Sachs disease shows this pattern of inheritance. Time to flowering was the only pea plant trait of this type studied by Mendel, and baritone voice and wavy hair are among the few human phenotypes (FEE- noh-"type") to result from it. People with sickle-cell trait, but not sickle- cell disease, show this kind of phenotype, which also results when red and white four o'clock plants are crossed. Often exemplified by the Palomino (pa- loh-MEE-no) horse and pink snapdragons, name this pattern of inheritance in which a heterozygous offspring displays a trait in between those of its dominant and recessive parents.
Most traits governed by this principle are the result of haplo- insufficiency, and when production of hexosaminidase A
incomplete dominance [accept incompletely dominant or semi-dominance; prompt on blending; prompt on heterozygous before it is mentioned; do not prompt on “dominance” or “dominant”]