In the Maternal Effect Case of Shell Coiling in Limnaea

question 32

Multiple Choice

In the maternal effect case of shell coiling in Limnaea snails, a Mendelian cross starting with a dextral (D/D) female and a sinistral (d/d) male yields ________ F2s.

• A) all dextral
• B) a 3:1 dextral:sinistral ratio
• C) all sinistral
• D) half dextral and half sinistral
• E) None of the above

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Definitions:

Negative Lead

An electrical connection that serves as the return path for current in a circuit, often marked with a minus (-) symbol or black color in electronics.

DMM

Digital Multimeter, an electronic measuring instrument that combines multiple measurement functions in one unit, such as voltage, current, and resistance.

Voltage Measurement

The process of determining the electrical potential difference between two points in an electric circuit.

Continuity

In electrical systems, the unbroken and complete path for current flow, crucial for the safe and effective operation of circuits.