Which of the following is true of Mendelian inheritance A. If a dominant allele is present, the recessive allele won’t be seen
B. If a recessive allele is a present, the dominant allele won’t be seen
C. Both recessive and dominant alleles show if present

The correct option is A. If a dominant allele is present, the recessive allele won’t be seen.

The dominant allele is the one which appear, and the recessive one isn't shown.

For example - If a person has 2 alleles of eye colour as B ( black ) and b ( brown ), in which black is dominant and the brown one is recessive, then the person will have black eye colour because only dominant allele shows its characteristics.

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cells spend most of their time in interphase

c is the correct answer!