Due to the cross between TTRr × ttrr the resultant progenies show what percentage of tall, red flowered plants?
Correct answer: A. 50%
- A. 50%
- B. 75%
- C. 25%
- D. 100%
Explanation
When you cross TTRr (tall and red-flowered) with ttrr (short and non-red-flowered), 50% of the resultant progenies will be tall and red-flowered. This is because there are two out of four possible allele combinations that result in the desired phenotype. Options b, c, and d are incorrect as they suggest percentages other than 50%, which is the accurate answer based on Mendelian genetics and the principles of dominant and recessive alleles.
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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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