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Question
Mendelian ratio 9:3:3:1 is due to
Mendelian ratio 9:3:3:1 is due to
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Solution
The correct option is A Law of independent assortment
A. Monohybrid cross forms the basis of Law of segregation. According to this law, in F2 hybrid, the dominant and recessive characters though remain together for long time, but do not mix with each other and separate or segregate at the time of gametogenesis (gamete formation).
B. Law of purity of gametes is the another name for law of segregation.
C. Law of independent assortment has dihybrid cross as its basis and it states that if the inheritance of more than one character is studied simultaneously, the factors or genes for each characters assort out independently to the other gene or factor. The dihybrid cross of Mendel is a good example of independent assortment. The presence of new combinations, i.e., round green and wrinkled yellow suggests that the genes for shape of seed and colour of seed are assorted independently. The results (9: 3: 3: 1) indicate that yellow and green seeds appear in the ratio of 9+3 : 3+1 = 3:1.
D. Law of unit characters states that traits are controlled by unit factors or pair factor which are now called genes.
Hence, Mendelian ratio 9: 3: :3: 1 is due to law of independent assortment. So, the correct answer is 'Law of independent assortment'.
A. Monohybrid cross forms the basis of Law of segregation. According to this law, in F2 hybrid, the dominant and recessive characters though remain together for long time, but do not mix with each other and separate or segregate at the time of gametogenesis (gamete formation).
B. Law of purity of gametes is the another name for law of segregation.
C. Law of independent assortment has dihybrid cross as its basis and it states that if the inheritance of more than one character is studied simultaneously, the factors or genes for each characters assort out independently to the other gene or factor. The dihybrid cross of Mendel is a good example of independent assortment. The presence of new combinations, i.e., round green and wrinkled yellow suggests that the genes for shape of seed and colour of seed are assorted independently. The results (9: 3: 3: 1) indicate that yellow and green seeds appear in the ratio of 9+3 : 3+1 = 3:1.
D. Law of unit characters states that traits are controlled by unit factors or pair factor which are now called genes.
Hence, Mendelian ratio 9: 3: :3: 1 is due to law of independent assortment. So, the correct answer is 'Law of independent assortment'.
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