Punnett square
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Punnett square. It is a tool used to predict the genotypes and phenotypes of offspring in a genetic cross. By combining the possible alleles from each parent, the Punnett square shows the potential genetic outcomes of their mating.
The Punnett Square
In all of Mendel's crosses, only one form of the trait appeared in the f1 generation.
P1 or parental
Crosses involving one gene or trait are called monohybrid crosses.
The places where the ecliptic crosses the equator are called the vernal equinox (where the Sun crosses from south to north) and the autumnal equinox (where the Sun crosses from north to south). These are the points where day and night are equal in length, marking the beginning of spring and autumn, respectively.