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Dear student
Please find your answer below to the asked query :
In Mendel's experiment, yellow colour of pea seed was dominant over green colour.
To determine the genotype of yellow seeded pea plant, test cross is carried out.
So To distinguish between a homozygous dominant plant (YY) and heterozygous plant (Yy), Mendel bred the unknown yellow pea (Y?) with a green pea, being homozygous recessive (yy).
So 2 cases are there :
Case 1
When YY is the genotype of unknown pea plant, then, In this case, the pea has no recessive allele to pass to the offspring. Therefore, 100% of the offspring receive one Y allele and one y allele, making them all yellow.
Please find your answer below to the asked query :
In Mendel's experiment, yellow colour of pea seed was dominant over green colour.
To determine the genotype of yellow seeded pea plant, test cross is carried out.
So To distinguish between a homozygous dominant plant (YY) and heterozygous plant (Yy), Mendel bred the unknown yellow pea (Y?) with a green pea, being homozygous recessive (yy).
So 2 cases are there :
Case 1
When YY is the genotype of unknown pea plant, then, In this case, the pea has no recessive allele to pass to the offspring. Therefore, 100% of the offspring receive one Y allele and one y allele, making them all yellow.
Case 2
When unknown yellow pea has the genotype Yy, half of the offspring will receive this allele. The other allele will be from the green pea, and will also be a green allele (y). In this case, half of the offspring will produce green peas.
So by progeny of test cross we can determine genotype of yellow seeded pea plant.
Regards
When unknown yellow pea has the genotype Yy, half of the offspring will receive this allele. The other allele will be from the green pea, and will also be a green allele (y). In this case, half of the offspring will produce green peas.
So by progeny of test cross we can determine genotype of yellow seeded pea plant.
Regards