Zoology - Principles of Inheritance and Variation Question with Solution | TestHub
ZoologyPrinciples of Inheritance and VariationMonohybrid and Dihybrid CrossesEasy2 minPYQ_2020
ZoologyEasysingle choice
A pure homozygous pea plant with yellow round seeds is crossed with a pure homozygous pea plant with green wrinkled seeds. Their progeny produced is allowed to undergo self-pollination. It produces four different phenotypes. Each phenotype is an expression of different types of genotypes. Select the correct option from the table.
| Yellow round seeds | Green round seeds | Yellow wrinkled seeds | ||
| I. | Types of genotypes: | 9 | 3 | 3 |
| II. | Types of genotypes: | 4 | 2 | 2 |
| III. | Types of genotypes: | 3 | 3 | 3 |
| IV. | Types of genotypes: | 5 | 2 | 2 |
Options:
Answer:
B
Solution:
In the dihybrid cross, yellow round seeds are produced because of genotypes YYRR, YyRr, YyRR and YYRr (4 genotypes). Green Round seeds are produced by genotypes yyRR and yyRr (2 genotypes). Yellow wrinkled seeds are produced due to YYrr and Yyrr (2 genotypes).
Stream:NTA_ABHYAS_NEETSubject:ZoologyTopic:Principles of Inheritance and VariationSubtopic:Monohybrid and Dihybrid Crosses
⏱ 2mℹ️ Source: PYQ_2020
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