Answer:
Given,
Colourless molecule is converted to black pigment by enzyme A. Black pigment is converted to agouti pigment by enzyme B.
Parent 1: AAbb = Black
Parent 2: aaBB = Colourless
AAbb X aaBB = AaBb (F1) The entire progeny is agouti coloured since dominant alleles for both the genes are present.
When AaBb X AaBb according to dihybrid cross in F2 :
A_B_ = 9 ( Agouti )
A_bb = 3 ( Black )
aaB_ = 3 ( Colourless )
aabb = 1 ( Colourless )
Hence genotypic ratio is 9 : 3 : 3 : 1
and phenotypic ratio is 9 (agouti) : 3 (black) : 4 (colourless)
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Answer:
Thymine, which is often abbreviated to T or Thy, can also be referred to as 5-methyluracil. It is one of the pyrimidine bases found in the nucleic acid of DNA, along with adenine, guanine and cytosine (A, G and C). These bases are the building blocks of DNA and life form on earth.
Explanation:
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