Question

Cross a yyll (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits). Look at the number of genotypes of the F1 generation:

yyll: 400, yyll: 100, yyll: 100, yyll: 400

Which offspring are the recombinant offspring in this cross?

Answer 1

The recombinant genotypes are Yyll: 100 and yyLl: 100.

In this cross between a heterozygous parent with dominant traits (YyLl) and a homozygous parent with recessive traits (yyll), the genotypes of the F1 generation are:

1. YyLl: 400 (non-recombinant)
2. Yyll: 100 (recombinant)
3. yyLl: 100 (recombinant)
4. yyll: 400 (non-recombinant)

Recombinant offspring are those with combinations of alleles different from the parental combinations. In this case, genotypes 2 and 3 are recombinant because they have a different combination of alleles compared to the parents. The recombinant genotypes are Yyll: 100 and yyLl: 100.

Cross a YyLl (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits). Look at the number of genotypes of the F1 generation:

YyLl: 400, Yyll: 100, yyLl: 100, yyll: 400

Which offspring are the recombinant offspring in this cross?