Dihybrid Cross with Heterozygous Traits — NEET Biology
📚 Practice ConceptWhen a cross in made between tall plant with yellow seeds (TtYy) and tall plant with green seed (Ttyy), what proportions of phenotype in the offspring could be expected to be (a) tall and green. (b) dwarf and green.
Which of the following statements regarding Mendel's experiments and laws of inheritance are correct? S1: Mendel studied seven pairs of contrasting traits in pea plants, including pod shape (inflated/constricted) and seed colour (yellow/green). S2: Leaf colour (red/green) and seed texture (rough/smooth) were among the specific traits investigated by Mendel in pea plants. S3: In a monohybrid cross between a true-breeding tall plant and a true-breeding dwarf plant, all F1 progeny express the dwarf phenotype, demonstrating the recessive nature of tallness. S4: The Law of Segregation states that during gamete formation, the alleles of a pair segregate from each other, ensuring each gamete receives only one allele with equal proportion. S5: A test cross involves crossing an organism showing a dominant phenotype (whose genotype is to be determined) with a heterozygous recessive parent. S6: Mendel's significant contribution included the application of statistical analysis and mathematical logic to biological problems, which was novel for his time.
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