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.
Last updated
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.
Practise Inheritance
1,238 free Inheritance MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A carrier of haemophilia is typically
A chromosome have two genes X and Y. Gene Y influences the phenotypic effect of gene X.Based on the influential phenotypic effect, the gene Y is:
A colour blind man marries a woman with normal vision whose father was colour blind. What proportion of their daughters will be colour blind?
A couple has blood group A and B, respectively. The blood group of their son is AB and the daughter has blood group O.The parents and the children have four different genotypes for the same trait because the:
A gene which affects two or more unrelated characteristics is called