The type of inheritance in which the phenotype of the offspring is intermediate between the two parents is called: MCQ with Answer and Explanation

The type of inheritance in which the phenotype of the offspring is intermediate between the two parents is called:
A. Incomplete dominance
B. Polygenic inheritance
C. Codominance
D. Complete dominance
Answer: Option A
Solution (By JKExamLibrary)
Incomplete dominance occurs when neither allele is completely dominant, resulting in a heterozygous phenotype that is a blend (e.g., red × white snapdragons produce pink). Codominance shows both alleles fully expressed (e.g., AB blood type). Complete dominance shows one allele masking another. Polygenic inheritance involves multiple genes contributing to a continuous trait.

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The process of cell death that is programmed and essential for normal development is:
A. Necrosis
B. Apoptosis
C. Phagocytosis
D. Autolysis

Correct Answer: Option B


Explanation:
Apoptosis is a genetically controlled, energy-dependent process of programmed cell death that removes unwanted, damaged, or infected cells without causing inflammation. It is vital for development (e.g., separation of digits in fingers) and tissue homeostasis. Necrosis is traumatic cell death causing inflammation. Autolysis is self-digestion after death, phagocytosis is engulfment.

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Question #2
Who proposed the Cell Theory?
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C. Rudolf Virchow and Robert Brown
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Correct Answer: Option A


Explanation:
The Cell Theory was proposed by Matthias Schleiden (1838) and Theodor Schwann (1839). Schleiden concluded that all plants are composed of cells, while Schwann extended this to animals, stating that all living organisms are composed of cells and their products. Rudolf Virchow later added that all cells arise from pre-existing cells.

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In sunflower, the arrangement of leaves on the stem is:
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Correct Answer: Option A


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Phyllotaxy is the pattern of leaf arrangement on the stem. In sunflower (and many other plants like mustard), the phyllotaxy is alternate, meaning a single leaf arises at each node. In opposite phyllotaxy (e.g., guava), two leaves arise at a node, and in whorled (e.g., Nerium), more than two leaves arise at a node.

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