Advertisements
Advertisements
प्रश्न
Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?
पर्याय
9 : 3 : 3 : 1 ratio of phenotypes only
9 : 3 : 3 : 1 ratio of genotypes only
1 : 1 : 1 : 1 ratio of phenotypes only
1 : 1 : 1 : 1 ratio of phenotypes and genotypes
MCQ
Advertisements
उत्तर
1 : 1 : 1 : 1 ratio of phenotypes and genotypes
Explanation:
Four different types of gametes are produced by the plant with genotype YyRr : YR : Yr : yR : yr. Only one type of gamete with genotype yr is produced by the double recessive plant, which has genotype yyrr. A 1 : 1 : 1 : 1 phenotypic and genotypic ratio results from crossing.
Parents: YyRr × yyrr
| YR | Yr | yR | yr | |
| yr | YyRr | Yyrr | yyRr | yyrr |
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
