In a double-stranded DNA molecule, if adenine constitutes 30%, what is the percentage of guanine? MCQ with Answer and Explanation

Explanation:
If two genes are completely linked, they are located very close together on the same chromosome and do not undergo independent assortment or crossing over. They are inherited together as a single unit. A dihybrid cross (RrYy x RrYy) with complete linkage behaves like a monohybrid cross. The F1 produces only parental gametes (RY and ry). The F2 generation will have a genotypic ratio of 1 RRYY : 2 RrYy : 1 rryy, resulting in a phenotypic ratio of 3:1.

Explanation:
The pancreas functions as an exocrine gland (secreting digestive enzymes into the duodenum via the pancreatic duct) and an endocrine gland (secreting insulin, glucagon, somatostatin from the islets of Langerhans into the blood). Thyroid, pituitary, and adrenals are purely endocrine.

Explanation:
The carpel is the female reproductive organ of a flower, consisting of the ovary, style, and stigma; the stigma is the terminal, sticky receptive surface where pollen grains land and germinate. The stamen is the male reproductive organ, consisting of the filament and the anther; the anther is the terminal sac where pollen grains (male gametophytes) are produced. After fertilization, the ovule develops into the seed, while the ovary wall matures and develops into the fruit. Thus, statements 1 and 2 are correct.