Ques. 3-5. Green seed (G) is dominant to yellow seed (g), and purple flower (P)
ID: 273137 • Letter: Q
Question
Ques. 3-5. Green seed (G) is dominant to yellow seed (g), and purple flower (P) is dominant to white (p). In a test cross of GgPp individuals, 301 of the offspring had green seed & white flower, 299 had yellow 3. In the GgPp parents in the testcross which genes are carried on each of the homologous chromosomes? 4. What gamete type or types was received by green seed, purple flower testcross offspring from their 5. What is the map distance between the 'G and P loci? a) 80 b) 40 c) 25 d) 10 e)5 seed & purple flower, 98 had green seed& purple flower and 102 had yellow seed& white flower. a) Gp & gP b) GP, Gp, gP, gp c) GP & Gp d) GP & gp e) none of the above GgPp parent? a) GP b) Gp c) gP d)a&b; e) b & cExplanation / Answer
In the offsrpring, we can find two differenet types of offspring those are two classes with high frequency genotypes and two with low frequency categores. Those high frequency varities are parents types and those low frequency varieties are recombinant types.
So, as per the parental categories, the genes arranged in trnas manner in heterozygote, thats why each class of parental category exhibits one dominant and one recesseive phenotype. So, the answers are
3. a. Gp and gP.
4. a. GP
5. The distance between genes=number of recombinants/total number of progeny x 1oo = 200/800x100 = 25%. The percentage of recombination = distance between genes. So, the answer is c. 25.
Find the below image for explanation...