Garden pea plant heterozygous for dominant trait tallness is self and 1200 seeds are obtained how many seedlings obtained from sajjid will have a parent genotypes

600 seeds

Explanation:

The allele for tallness - T

The allele for dwarfness - t

heterozygous genotype for tallness - Tt

When heterozygous genotype are crosses

Tt x Tt

T t

T TT Tt

t Tt tt

We get

TT (tall plants) - 1/4

Tt (tall plants with hetrozygous genotype) - 2/4

tt (short plants) - 1/4

Now,

2/4 of 1200 seeds will be 600

Thus, 600 seeds will have the same genotype as of parents.