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)
Answer:
22 map units
Explanation:
Linked genes may be defined as the genes present on the same chromosomes and they are inherited to the next progeny. The linked genes produces the recombinant progeny.
Distance between the linked gene = No. of recombinants / total number × 100.
Here the parental are 198 Tall Yellow, 192 Short Green.
The recombinant progeny are 54 Tall Green, and 56 Short Yellow.
Distance = 
Distance = 
Distance = 22 map units.
So, the distance between the genes are 22 map units.
The study of life is called Biology
Answer:
Mainly water
Explanation:
The main function of a plant's vacuole is to provide pressure to give structure to the cell itself. As for central vacuoles, they fill up and store water which pushes against the cell wall.
Hopefully this made sense
Answer:
The smallest planet is Mercury
Explanation: