How to solve MOST Simple Mendelian Genetics problems
Dihybrid cross is a cross between two different lines (varieties, strains) that differ in two observed traits. In the Mendelian sense, between the alleles of both these loci there is a relationship of complete dominance - recessive. In the example pictured to the right, RRYY/rryy parents result in F1 offspring that are heterozygous for both R and Y (RrYy).[1]
In the name “Dihybrid cross“, the “di“ indicates that there are two traits involved (e.g. R and Y), the “hybrid“ means that each trait has two different alleles (e.g. R and r, or Y and y), and “cross“ means that there are two individuals (usually a mother and father) who are combining or “crossing“ their genetic information.
The Dihybrid cross is easy to visualize using a Punnett square of dimensions 4 x 4.
The rules of meiosis, as they apply to the dihybrid, are codified in Mendel’s first law and Mendel’s second law, which are also called the Law of Segregation and the Law of Independent Assortment, respectively.
For genes on separate chromosomes, each allele pair shows independent segregation. If the first filial generation (F1 generation) produces four identical offspring, the second filial generation, which occurs by crossing the members of the first filial generation, shows a phenotypic (appearance) ratio of 9:3:3:1, where:
the 9 represents the proportion of individuals displaying both dominant traits
the first 3 represents the individuals displaying the first dominant trait and the second recessive trait
the second 3 represents those displaying the first recessive trait and second dominant trait
the 1 represents the homozygote, displaying both recessive traits.
#Homozygote #Dihybrid #phenotypic #punnettSquare #genes #loci #dihybridCross #Genetics #MandelianGenetics #DNA #RNA #crossingover #GeneticQuiz #MendelianCross #geneticsForBeginners #PunnetSquare #NikolaysGeneticsLessons #mendelianGenetics #simpleGeneticCrosses #productRule #probabilities #GeneticsFieldOfStudy #MendelianInheritance #gamets #simpleMendelianTraits #punnettSquares #biology #monohybridCross #probability
1 view
102
24
2 weeks ago 01:33:20 1
Reinhardt Buhr - The Space Between (2021 Full Album) - Ambient Ableton Live Looping
2 weeks ago 00:03:19 1
How’s It Gonna Be? (Official Video)
2 weeks ago 00:06:21 1
How to Invest Tether USDT and Earn up to 10% Profit Daily | Best USDT Investment Website 2024
2 weeks ago 00:05:14 1
Unlock the Power of Local SEO! Learn How with Local Kingdom: Lead Generation SEO – Now 91% Off!
2 weeks ago 00:04:24 1
Ed Sheeran - Shape of You (Official Music Video)
2 weeks ago 00:04:36 1
Данечка собирается в Африку / Daniela goes to Africa
2 weeks ago 00:08:59 1
Execution by Their Own Hands: How Russian Soldiers Chose Death Instead of Resistance
2 weeks ago 00:08:02 1
Dill Erases all wrinkles on the face! 100 year old recipe! Top Recipes
2 weeks ago 00:22:15 1
🧪🧪🧪🧪Прорыв в технологии Варп-двигателя.
2 weeks ago 00:02:20 1
Decadent | “Madness” Trailer
2 weeks ago 00:10:31 1
Basic Handgun Calibers Explained - Semi-Automatic Ammo Breakdown
2 weeks ago 00:34:43 1
30 Minute Full Body Cardio HIIT Workout [NO REPEAT]
2 weeks ago 00:25:36 1
People CHANGE When They Know You’re a Chosen One! (7 Shocking Behaviors You Won’t Believe!)
2 weeks ago 00:55:10 1
Albania migration scam & Hijab CIVIL WAR in Islam
2 weeks ago 00:05:00 1
Heilung | Anoana [Official Video]
2 weeks ago 00:20:03 1
Is It Pyramids All The Way Up? - Questions For Corbett
2 weeks ago 01:27:01 1
#ЯВОЛОНТЕР. Истории неравнодушных. Режиссёрская версия
2 weeks ago 00:22:13 1
How did Hezbollah’s chief react to Israel’s 2-day terror blitz? | The Cradle Bytes
2 weeks ago 01:15:01 1
Scott Ritter: Lebanon Device Attacks, Hezbollah Military Strategy & The BRICS Palestine Solution
2 weeks ago 00:01:46 1
1 ЛОЖКА В КОМПОСТ и ПЕРЕПРЕЮТ ДАЖЕ КОСТИ! Безопасный БЫСТРЫЙ СУПЕРкомпост уже для ОСЕННИХ посадок.
2 weeks ago 01:41:50 2
Ashish Sharma: ’I was replaced last minute in an Aishwarya Rai Akshay Kumar movie by ...!’
2 weeks ago 00:04:15 1
Stop T vs No T - American English Pronunciation
2 weeks ago 00:06:04 1
Pokemon Go Hack 2024 - Pokemon Go Spoofer with Joystick Teleport GPS iPOGO (iOS & Android)