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Homozygosity and heterozygosity of an individual can be determined by
  • a)
    Back cross
  • b)
    Self-fertilization
  • c)
    Test cross
  • d)
    All of the above
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Homozygosity and heterozygosity of an individual can be determined bya...
A test cross is a cross between an individual of unknown genotype and a homozygous recessive individual. By observing the phenotypic ratios of the offspring, it is possible to determine the genotype of the unknown individual.
In a test cross, if the individual being tested is heterozygous (having one dominant and one recessive allele), the offspring will show a 1:1 ratio of the dominant and recessive phenotypes. On the other hand, if the individual being tested is homozygous dominant (having two dominant alleles), all the offspring will display the dominant phenotype.
Therefore, a test cross can be used to determine whether an individual is homozygous (having two identical alleles) or heterozygous (having two different alleles) by examining the phenotypes of the resulting offspring.
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Homozygosity and heterozygosity of an individual can be determined bya)Back crossb)Self-fertilizationc)Test crossd)All of the aboveCorrect answer is option 'C'. Can you explain this answer?
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