If you cross two heterozygous (Yy) pea plants, what proportion of the offspring will be heterozygous?

2/4 = 50% of the offsring will be heterozygous

50%

Explanation: If You mak a Punnet Square, or just a 2x2 box with a Y and y on both sides, you'd get 1 YY (25%), 2 Yy (50%), and 1 yy (25%) offspring.

typically, most spiders possess eight eyes. however, others have as many as 12, and some don't have any. these eyes are for detecting light from dark, deciphering shapes and for gathering their prey.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.