Gregor Mendel crossed a purple-flowered pea plant with a white-flowered pea plant. The white- flowered trait disappeared from the first filial generation (F1) but reappeared in the F2 generation.
In one paragraph, using your own words, explain what happened.

the answer is d.) homologous; have mammary glands

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.