Blue-flowered and white-flowered plants on cr | vedclass

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(A) The cross between blue-flowered and white-flowered plants resulting in a $60:40$ ratio (approximately $1:1$) indicates a test cross between a hete

Vedclass · Accepted Answer

$76:24$

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(A) The cross between blue-flowered and white-flowered plants resulting in a $60:40$ ratio (approximately $1:1$) indicates a test cross between a heterozygous dominant $(Ww)$ and a homozygous recessive $(ww)$ parent.Thus,the blue-flowered progeny are all heterozygous $(Ww)$.When these blue-flowered $(Ww)$ plants are self-pollinated,the cross is $Ww 	imes Ww$.According to Mendelian inheritance,the phenotypic ratio of the offspring will be $3$ blue-flowered $(WW, Ww, Ww)$ to $1$ white-flowered $(ww)$.This $3:1$ ratio corresponds to $75\%$ blue and $25\%$ white,which is approximately $76:24$.

Blue-flowered and white-flowered plants on crossing gave progeny of blue and white-flowered in the ratio of $60 : 40$. What ratio of blue and white is expected if the blue-flowered plants are self-pollinated?

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