Q. 174.0( 4 Votes )
In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are:
A. phenotypes - 4; genotypes - 16
B. phenotypes - 9; genotypes - 4
C. phenotypes - 4; genotypes - 8
D. phenotypes - 4; genotypes - 9
The F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are phenotypes-4; genotypes – 9.
For example consider the dihybrid cross between Round yellow(RRYY) and Wrinkled green(rryy) seed producing plants.
Gametes are RY and ry and the selfing of F1 generation(RrYy) we have:
Phenotypes obtained are round yellow, round green, wrinkled yellow, wrinkled green thus the number of phenotypes is 4.
Genotypes obtained are YYRR, YyRR, yyRR, YYRr,YyRr, yyRr, YYrr,Yyrr, rryy thus the number of phenotypes is 9.
Rate this question :
Discuss in detail the contributions of Morgan and Sturvant in the area of genetics.Biology - Exemplar
Two genes ‘A’ and ‘B’ are linked. In a dihybrid cross involving these two genes, the F1 heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?Biology - Exemplar
How was it concluded that genes are located on chromosomes?Biology - Exemplar