Question

What map unit (Centimorgan) is adopted in the construction of genetic maps?
(1) A unit of distance between two expressed genes, representing 10% cross over.
(2) A unit of distance between two expressed genes, representing 100% cross over.
(3) A unit of distance between genes on chromosomes, representing 1% cross over.
(4) A unit of distance between genes on chromosomes, representing 50% cross over.

Answer 1

Answer:

The distance between two genes is measured in units known as centimorgan.

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Answer 2

Map unit is considered as a unit of distance between genes on chromosomes, representing 1% cross over.

Step by step explanation:

• 1 Map unit describes cross over 1 percent.
• Map unit is used for genetic distance measurement. The average number of cross over occurrence is dependent on this genetic distance.
• Therefore, the correct explanation of map uni (Centimorgan) is a unit of distance between genes on chromosomes, representing 1% cross over.

Hence, correct option is -3