In a pine’s life cycle, hybrid “1†pine tree the needles werefound to have the
alleles Ll (heterozygous) producing long needles. In a hybrid “2â€pine tree, the
needles were found to have the alleles ll (homozygous recessive)producing
short needles. If a pollen from hybrid “1†pollinated hybrid “2†toform a hybrid “3â€
plant which about 50% were long needle and 50% were short needle.Give the
genotypes for the following structures found in the life cycles ofthese 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�
Draw and label the parts of the entire ovule and its content’sat maturity (before
fertilization) of the two Divisions “angiosperm†and “gymnosperm(pine)â€. Explain
what happens to the various parts of each ovule. Give differencesbetween
these two ovules.
