Advertisements
Advertisements
Question
Advertisements
Solution
In a dihybrid cross , two pairs of alleles or contrasting characters are considered in parents.
For example, cotyledon colour and seed shape of pea are used as two pairs of alleles.
Suppose, among the two parents, one was true breeding dominant i.e. yellow coloured cotyledons and round seeds, YYRR and the other was a true breeding recessive i.e. green coloured cotyledons and wrinkled seeds, yyrr. On crossing the two parents, F1 generation so obtained had all yellow and round seeds.
On self pollinating, the hybrids - YyRr produced four types of seeds in F2 generation:
(i) Yellow cotyledons and round seeds (YYRR)
(ii) Yellow cotyledons and wrinkled seeds (YYrr)
(iii) Green cotyledons and round seeds (yyRR)
(iv) Green cotyledons and wrinkled seeds (yyrr)
Thus the phenotypic ratio of a dihybrid cross is 9:3:3:1.
APPEARS IN
RELATED QUESTIONS
Give Technical Term:
The ratio of offspring on F2 generation in a dihybrid cross.
Complete the following sentence with appropriate word:
A character that is suppressed is _________.
Select the correct statement from the ones given below with respect to dihydrid cross
What are the reasons for Mendel’s successes in his breeding experiment?
In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.
Each gamete carry ______.
Which one of the following genetic ratios will be obtained in a dihybrid test cross:
In the Mendelian dihybrid cross when heterozygous round yellow is self grossed, round green offsprings are represented by the genotype.
Which of the following was NOT cited as a reason for the initial rejection of Mendel's work by the scientific community?
In what year was Mendel's work independently rediscovered by multiple scientists?
