MEDIUM
ALLEN NEET Coaching
ApplyAce your NEET preparation with ALLEN Online Programs
Search Colleges, Exams, Schools & more
Dihybrid Cross of Mendel - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
-
Dihybrid Cross is considered one of the most asked concept.
-
15 Questions around this concept.
Solve by difficulty
A Tall plant with Red seeds (both dominant traits) was crossed with a dwarf plant with white seeds. If the segregating progeny produced an equal number of tall red and dwarf white plants, what would be the genotype of the parents?
Two interacting genes (independently assorting) were involved in the same pathway. Absence of either gene's function leads to absence of the end product of the pathway. A dihybrid cross involving the two genes is carried out. What fraction of the F2 progeny will show the presence of the end product?
Concepts Covered - 1
Dihybrid Cross
- Mendel also worked with and crossed pea plants that differed in two characters, as is seen in the cross between a pea plant that has seeds with yellow colour and round shape and one that had seeds of green colour and wrinkled shape.
- Mendel found that the F1 progeny resulting from the crossing of the parents, had yellow coloured and round shaped seeds.
- Thus, yellow colour was dominant over green and round shape dominant over wrinkled.
- Let us use the genotypic symbols Y for dominant yellow seed colour and y for recessive green seed colour, R for round shaped seeds and r for wrinkled seed shape.
- The genotype of the parents can then be written as RRYY and rryy.
- The gametes RY and ry unite on fertilisation to produce the F1 hybrid RrYy.
- When Mendel self hybridised the F1 plants he found that 3/4th of F2 plants had yellow seeds and 1/4th had green.
- The yellow and green colour segregated in a 3:1 ratio.
- Round and wrinkled seed shape also segregated in a 3:1 ratio; just like in a monohybrid cross.
- In the dihybrid cross, the phenotypes round,yellow; wrinkled, yellow; round, green and wrinkled, green appeared in the ratio 9:3:3:1.
- The phenotypic ratio of 9:3:3:1 occurs in 9 types of genotypes.
- Such a ratio was observed for several pairs of characters that Mendel studied.
Study it with Videos
Dihybrid Cross"Stay in the loop. Receive exam news, study resources, and expert advice!"
Books
Reference Books
Clear your Basics with NCERT
E-books & Sample Papers
NEET 2024 Answer Key by Aakash (Code T)
521+ Downloads
NEET 2024 Answer Key by Aakash (Code S)
259+ Downloads
Get Answer to all your questions
NEET Articles
May 07, 2024
Begin a career in Medical and Allied Sciences. Admissions Open for
Amrita Vishwa Vidyapeetham Allied & Life Science 2024
ApplyAdmissions Open for multiple allied and health sciences programs across 5 campuses | Ranked #7 in India by NIRF, NAAC A++ Accredited
PACE IIT & Medical, Financial District, Hyd
ApplyEnrol in PACE IIT & Medical, Financial District, Hyd for JEE/NEET preparation
Resonance Coaching
ApplyEnroll in Resonance Coaching for success in JEE/NEET exams
NEET previous year papers with solutions
ApplySolve NEET previous years question papers & check your preparedness
NEET College Predictor
ApplyKnow possible Govt/Private MBBS/BDS Colleges based on your NEET rank
News and Notifications
2 days ago :
3 days ago :
3 days ago :
May 02, 2024 - 08:54 PM IST
May 02, 2024 - 05:46 PM IST
May 01, 2024 - 06:34 PM IST
May 01, 2024 - 06:17 PM IST
April 30, 2024 - 09:30 PM IST
April 30, 2024 - 07:30 PM IST
April 30, 2024 - 06:26 PM IST
Download Careers360 App's
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile
300M+
Students
36,000+
Colleges
550+
Exams
1500+
E-Books
16000+
Certifications
We Appeared in
Back to top