Question

The probability of the $F_1$ dihybrid producing gametes with two recessive genes is:

• A. $\frac{1}{8}$
• B. $\frac{2}{4}$
• C. $\frac{1}{4}$
• D. $\frac{3}{4}$

Answer 1

The correct option is C

$\frac{1}{4}$

The $F_1$ dihybrid is double heterozygous (YyRr) plant. Hence it produces 4 types of gametes (YR), (Yr), (yR) and (yr) with equal probability. So probability of producing a double recessive gamete is 25% or $\frac{1}{4}$.