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In Mirabilis a hybrid for red ...
Video Solution: In Mirabilis a hybrid for red (RR) and white (rr) flower produces pink (Rr) flower. A plant with pink flower is crossed with white flower the expected phenotypic ratio is
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Text Solution
Red : Pink : White ( 1 : 2 : 1)Pink : White (1 : 1)Red : White (1 : 1)Red : white (3 : 1)
Answer : B
Solution : (b) Mirabilis jalapa shows incomplete dominance. <br> <img src="//d10lpgp6xz60nq.cloudfront.net/physics_images/ERRL_BIO_NCERT_NEET_V02_7_1_E01_133_S01.png" width="80%">
Answer
Step by step video & image solution for [object Object] by Biology experts to help you in doubts & scoring excellent marks in Class 12 exams.
Question Details till 08/10/2022
Question | |
Chapter Name | Principles Of Inheritance And Variation |
Subject | Biology (more Questions) |
Class | 12th |
Type of Answer | Video & Image |
Question Language | In Video - English In Text - English |
Students Watched | 9.8 K + |
Students Liked | 0 + |
Question Video Duration | 4m19s |
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Related Answer
When red and white flowered Mirabilis plants are crossed, all pink flowers are produced in `F_(1)` generation. When `F_(1)` progeny is selfed , the expected phenotypic and genotypic ratios are, respectively .
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Solution
The correct option is D 0%
The red and white-flowered plants of
Mirabilis jalapa exhibit incomplete dominance in the inheritance of flower colour, due to which they produce pink-flowered plants upon hybridisation.
If pure breeding red-flowered plants are represented as ‘RR’ and pure breeding white-flowered plants as ‘rr’, then the pink-flowered plants are ‘Rr’.
A cross between ‘Rr’ and ‘rr’ would produce pink-flowered plants (Rr) and white-flowered plants (rr) in the ratio of 1 : 1
Hence, there are zero chances of getting a red-flowered plant.
Parents: Rr (Pink) X rr (White)
Gametes: R r r
RrrRr (Pink)rr (White)
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