Since you forgot to put capital letters i assume it's like this:
1)A Cross between YyLl (heterozygous parent with dominant traits) and yyll (homozygous parent with recessive traits).
2)offspring YyLl: 400, Yyll: 100, yyLl: 100 and yyll: 400
The recombinant offspring are allele combinations that are not directly inherited from the parents.
The parents combinations:YyLl and yyll,
The recombinant combinations: Yyll and yyLl
The other types are exacly like the parents so they are not recombinant.
answer: Yyll and yyLl