Question

In a pine's life cycle, hybrid "1" pine tree the needles were found to have alleles L1 (heterozygous) producing long needles. In a hybrid "2" pine tree, the needles were found to have the alleles II (homozygous recessive) producing short needles. If a pollen from hybrid "1" pollinated hybrid "2" to form a hybrid "3" plant which about 50% were long needle and 50% were short needle. Give the genotypes for the following structures found in the life cycles of these plants:

Genotype of the pollen grain's nucleus of plant hybrid "1"?

Genotype of archegonia of plant hybrid "2"?

Genotype of megaspore mother cell of plant hybrid "2"?

Genotype of sporophyte of plant hybrid "3"?

Genotype of microspores of plant hybrid "1"?

Genotype of hypocotyl of plant hybrid "3"?

Genotype of seed coat of plant hybrid "2"?

Genotype of ovary of plant hybrid "2"?

Answer 1

Genotype of the pollen grain's nucleus of plant hybrid "1"-----L or l (haploid)

Genotype of archegonia of plant hybrid "2"------ll (diploid)

Genotype of megaspore mother cell of plant hybrid "2"----ll (diploid)

Genotype of sporophyte of plant hybrid "3"-----Ll or ll ---(diploid)

Genotype of microspores of plant hybrid "1"----L or l (haploid)

Genotype of hypocotyl of plant hybrid "3"---Ll or ll (diploid)

Genotype of seed coat of plant hybrid "2"----- ll (diploid)

Genotype of ovary of plant hybrid "2"-----ll (diploid)