Answer:
given,
LL║ll and DD║dd,
after crossing over, Ld║Ld × lD║lD
LLdd × llDD
in F1 generation, they will give, LLll, DDdd, LLDD, lldd → LlDd
in eF2 generation, the offsprings will be, LLll × DDdd
LLDD ,LLdd, LLDd, llDD, lldd, llDd, LlDD, Lldd, LlDd
1. yes, these genes are coupling.
2. → phenotypes of parental genes = ligules, liguleless, tall and dwarf
genotypes of parental genes= LLdd, llDD i.e; heterozygous
→ phenotypes of F1 generation = 25% Ligules, 25% tall, 25% ligules-tall, 25% liguleless-dwarf
genotypes of F1 generation = heterozygous ; LlDd that is ligules-tall
3. recombination frequency= no of recombinant / total progeny × 100%
= (1344+1344) / 6156+1344+1344+1156 × 100%
= 2688/ 10000 × 100%
= 26.88 %
that means linkage happened
and the map distance is 26.88 map unit.
