Question

By crossing homozygous short purple flowering parent with a heterozygous tall purple flowering parent you get 41 tall progeny. What will be the expected number of short progenies?

(a) 12

(b) 42

(c) 60

(d) 80

I have been asked this question by my school principal while I was bunking the class.

This interesting question is from Dihybrid Cross in portion Mendelian Genetics of Cytogenetics

Answer 1

The correct option is (b) 42

To elaborate: This is a case of a test cross for the Height allele. The ratio should be 1:1 for short: tall. If there are 41 tall progeny there must be a similar number say 42 of short ones.