It Is Desired to Project the Image of an Object

question 13

Multiple Choice

It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm.How far from the lens should the object be placed?

• A) 100 cm
• B) 80 cm
• C) 4.0 cm
• D) 25 cm
• E) 5.0 cm

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Definitions:

Recessive Gene

A recessive gene is one whose effects are masked in the presence of a dominant gene, and thus, its traits are only expressed in a homozygous state.

Dominant Gene

a gene that suppresses the expression of its allele, resulting in its trait being manifested in the organism.

Brown Eyes

A physical trait characterized by the presence of melanin in the iris, resulting in a brown coloration of the eyes.

Dominant-Recessive Genes Principle

A genetic principle in which the dominant allele masks the effect of a recessive allele in heterozygous pairs.