Homework SourseWhat would be a typical phenotypic monohybrid ratio in which
What would be a typical phenotypic monohybrid ratio in which a lethal allele is involved?
| 13:5 |
| 2:1 |
| 9:3:3:1 |
| 3:1 (it is not this one) |
| 6:2:3:1 |
Solution
Answer- 2:1
Explanation- The normal genotypic ratio upon crossing two heterozygotes is 1(homozygous dominant) :2 (heterozygous):1(homozygous recessive). A 2:1 phenotypic ratio indicates that the homozygous recessive individuals show lethal gene effect and are not born.
