Question

# Heterozygous tall and red flowered pea plants are selfed and total 2000 seeds are collected. What is the total number of seeds for both heterozygous traits?

A
250
B
500
C
1250
D
750

Solution

## The correct option is B 500 Gametes TRTr tR tr TR  TTRR- Homozygous Tall and RedTTRr- Homozygous Tall and heterozygous Red TtRR- Heterozygous tall and homozygous Red TtRr-Heterozygous Tall and red Tr TTRr-Homozygous tall and heterozygous red TTrr-Homozygous Tall and Homozygous white TtRr-Heterozygous Tall and heterozygous Red Ttrr-Heterozygous Tall and homozygous whitetR TtRR-Heterozygous Tall and homozygous Red TtRr-Heterozygous Tall and heterozygous Red  ttRR-Homozygous dwarf and homozygous Red  ttRr-Homozygous dwarf and heterozygous Red  tr TtRr-Heterozygous Tall and heterozygous Red  Ttrr-Heterozygous tall and homozygous redttRr- Homozygous dwarf and heterozygous Redttrr-homozygous tall and redSo, the cross is between TtRr x TtRr (where T is dominant on t and gives tallness over dwarfness while the R is dominant over r and gives red colour).So, on the crossing, we found that out of 16,4 progenies are having both the traits as heterozygous which are highlighted in the cross.So, out of 2000 progeny seeds formed the number of progenies with heterozygous traits are- 4/16 x 2000                                       = 500 seeds.So, the correct answer is '500'.Biology

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