As a result of cross-fertilization of a pure breeding pea plant having purple coloured flowers; with that of white coloured flowers, the offsprings will have flowers with:
Correct answer: D. All purple
- A. ¼ purple ; ¾ white
- B. ¼ white ; ¾ purple
- C. All white
- D. All purple
Explanation
As it is mentioned in the question that it is pure breeding, we can assume the pea plants involved in the breeding to be homozygous dominant and recessive, accordingly. As the allele coding for purple flowers is dominant over white, we would get all offsprings having purple flowers since all the offsprings would be heterozygous.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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About Mendel's Laws of Inheritance
Mendelian inheritance explains how alleles separate into gametes and assort during reproduction, producing predictable genotype and phenotype ratios. Questions cover dominance, recessiveness, homozygous and heterozygous conditions, the laws of segregation and independent assortment, monohybrid and dihybrid crosses, test crosses and the limits caused by linked genes.
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