If test cross gives 50% dominant and 50% recessive characters it means the parent is:
Correct answer: D. Heterozygous dominant
- A. Homozygous recessive
- B. Heterozygous
- C. Homozygous dominant
- D. Heterozygous dominant
Explanation
If the seed is heterozygous round (Rr), it will grow into a plant that forms half the gametes, with 'R`and half with `r` allele. Wrinkled seed plant will form only `r` type of gametes. Fertilization will result into 50% round and 50% wrinkled seed progeny. Even a single wrinkled seed in the progeny is a convincing proof for Heterozygous nature of the round parent.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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