A cross between two white flowered varieties of Sweet Pea yields purple flowered plants due to
A cross between two white flowered varieties of Sweet Pea yields purple flowered plants due to
The correct option is B Complementary genes
In sweet pea (Lathyrus odoratus) two varieties of white flowering plants were
seen. Each variety bred true and produced white flowers in successive
generations. According to Bateson & Punnett, when two such white
varieties of sweet pea were crossed, the offspring were found to have purple
coloured flowers in F1 but in F2 generation 9 were purple and 7 white.
It is
clear that, for the production of the purple flower colour both complementary
(C and P) genes are necessary to remain present. In the absence of either genes
(C or P) the flowers are white. Thus, it is clear that genes C and P interact
and presence of both is essential for the purple colour in the flower. These
types of genes in which one gene complements the action of the other gene,
constitute complementary genes or factors.
So,
the correct option is ‘complementary genes’.
In sweet pea (Lathyrus odoratus) two varieties of white flowering plants were seen. Each variety bred true and produced white flowers in successive generations. According to Bateson & Punnett, when two such white varieties of sweet pea were crossed, the offspring were found to have purple coloured flowers in F1 but in F2 generation 9 were purple and 7 white.
It is clear that, for the production of the purple flower colour both complementary (C and P) genes are necessary to remain present. In the absence of either genes (C or P) the flowers are white. Thus, it is clear that genes C and P interact and presence of both is essential for the purple colour in the flower. These types of genes in which one gene complements the action of the other gene, constitute complementary genes or factors.
So, the correct option is ‘complementary genes’.
