Use the illustration above to answer the question that follows What is the genotypic ratio of the F\(_2\) generation?
Question 1 Report
Use the illustration above to answer the question that follows
What is the genotypic ratio of the F\(_2\) generation?
Answer Details
The diagram shows a monohybrid cross between two heterozygous parents, both with the genotype Rr. Each parent produces two types of gametes: R and r.
When these gametes combine during fertilisation, the F2 offspring are:
- RR (homozygous dominant)
- Rr (heterozygous)
- Rr (heterozygous)
- rr (homozygous recessive)
Counting the genotypes gives 1 RR : 2 Rr : 1 rr, which simplifies to a genotypic ratio of 1 : 2 : 1. This is the classic Mendelian ratio for a cross between two heterozygotes at a single gene locus with complete dominance.
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