In Primroses, the Dominant Allele of Gene K Is Necessary

question 23

Multiple Choice

In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue pigment synthesis is inhibited by a dominant allele of gene D. In other words, plants with the genotype K- D- will not produce pigment (and their flowers will be white) because of the presence of the D allele.
-If two dihybrid plants (Kk Dd) are crossed, what is the ratio of blue to white offspring in the progeny?

• A)3 blue: 1 white
• B)7 blue: 9 white
• C)4 blue: 12 white
• D)3 blue: 13 white
• E)1 blue: 15 white

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Definitions:

Salt Monopoly

A situation where a single entity controls the supply and pricing of salt, historically seen as a strategic control over a vital commodity.

Economic Profits

Profits earned by a firm or individual in excess of the opportunity costs of all resources used to generate those profits, representing returns beyond the normal profit level.

Pure Competition

A market structure characterized by a large number of small firms, a homogeneous product, perfect information, and easy entry and exit from the market.

Monopoly

A market structure characterized by a single seller offering a unique product or service, with significant barriers to entry for potential competitors.