Four Possibly Different Albino Strains of Neurospora Were Each Crossed $\times$

question 52

Essay

Four possibly different albino strains of Neurospora were each crossed to wild type.All crosses resulted in 1/2 wild-type and 1/2 albino progeny.Crosses were made between the first strain and the other three with the following results:
1 $\times$ 2: 975 albino : 25 wild type
1 $\times$ 3: 1000 albino
1 $\times$ 4: 750 albino : 250 wild type
Which mutations represent different genes and which genes are linked? How did you arrive at your conclusions?

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Definitions:

Formal Period

A stage in cognitive development, according to Piaget, typically beginning in adolescence, where an individual can think abstractly and logically.

Preoperational Period

A stage in Piaget's theory of cognitive development, occurring approximately between the ages of 2 and 7, characterized by rapid language growth and symbolic thinking.

Preoperational

A stage in Piaget's theory of cognitive development where children from about 2 to 7 years old begin to engage in symbolic play and have difficulty understanding other viewpoints.

Sensorimotor

A stage in Piaget's theory of cognitive development where infants learn about the world through their movements and sensory impressions.