A quick overview of the difference between homozygous and heterozygous alleles relating to Mendelian genetics. Thanks for stopping by. Today we are talking about homozygous vs heterozygous alleles. This is going to be a pretty quick video but I wanted to make it because I know it’s a tricky topic. Let’s start by breaking down the terms. Any time you encounter the term “heterozygous” you should know it’s referring to two things being different or distinct from one another whereas “homozygous” refers to two things being the same. Basically hetero=different and homo=same. The same is true when referring to alleles. Using letters to represent alleles and referring to the most taught case of dominant vs recessive alleles. Two lower case letters such as “bb” would be a homozygous set of alleles, and in this case homozygous recessive. “BB” would also be homozygous, but would be homozygous dominant. “Bb” would be heterozygous. You wouldn’t assign dominant or recessive to the last pairing because it’s the only heterozygous option, so it needs no further distinction. Alright, let’s do a quick recap. In dominant vs recessive alleles, if the two alleles are the same, the alleles are homozygous, the upper case being homozygous dominant and the lower case be homozygous recessive. If the two alleles are different, one uppercase one lowercase, then it’s heterozygous, just heterozygous. I hope this clears up any confusion on the topic. Throw any additional questions in the comments and be sure to watch my other videos and share them with your friends. I’ll catch you next time.
✔️ LEARN 20 WORDS FAST - https://youtu.be/TSGdNMzlrcg What does Homozygous mean? Learn the meaning of Homozygous as we define this advanced vocabulary word with a simple definition, pictures, example sentences, English pronunciation and audio. Homozygous definition (adjective) matching in kind, often related to genetics Homozygous pronunciation: hoh-muh-zahy-guh s Examples of Homozygous in a sentence: 1. Because Will carries two matching alleles for blue eyes, he is homozygous for that physical characteristic. 2. Tina is homozygous for sickle cell anemia because her parents gave her identical alleles for the condition. 3. Although Jim has one orange and two apples, he needs three oranges to make a homozygous glass of orange juice. 4. Being homozygous for a trait means you have identical alleles in the gene responsible for that attribute. 5. While the alleles Xx are heterozygous, the xx alleles are homozygous because they are alike. Homozygous synonyms and other related words for Homozygous homozygote Dictionary Definition & Sentences Page https://wordsinasentence.com/homozygous-in-a-sentence/ FOLLOW ME ON TWITTER + VISIT OUR VOCABULARY RESOURCE LEARNING WEBSITES (Bookmark 'em!) 👇 ► http://VocabularyVideos.com - a memorable name that'll redirect you to our word of the day vocabulary videos. ► https://WordsinaSentence.com - our sentence dictionary Website, where we define words with sentences ► https://Twitter.com/vocabularyhelp - Twitter account for my vocabularic tweets
Genetic Learn the difference between a homozygous trait and a heterozygous trait. The homozygous trait is made up of two of the same alleles. A heterozygous trait is made up of two different alleles. Punnett square helps you determine the likelihood that a certain phenotype will appear when crossing organisms. Link to the worksheet: Sciencespot http://sciencespot.net/Pages/classbio.html -~-~~-~~~-~~-~- Please watch: "Study Skills Teacher's Secret Guide to your Best Grades" https://www.youtube.com/watch?v=f3bsg8gaSbw -~-~~-~~~-~~-~- * * For more Life Science videos and summaries see, http://www.moomoomath.com/Middle-School-Science-and-Biology.html
Check out Bas Rutten's Liver Shot on MMA Surge: http://bit.ly/MMASurgeEp1 A Punnett square is used to predict the chances of an offspring to have its parents' traits. These squares are most commonly divided into four parts, with each part equalling a 25% chance of the offspring receiving that set of genes. More complicated squares may have more than four parts, though the same basic method applies. The letters surrounding and within each square represent alleles. They are one part of a gene pair occupying a specific part of a chromosome. All dominate alleles have capital letters, while the recessive ones are lowercase. Dominate alleles will always overpower recessive ones in the expression of the gene. If the alleles for a parent do not match, they are known as heterozygous. In the image above the Gg is heterozygous. This can happen if there is a dominate and a recessive gene in the parent. If the alleles are the same for that expressed gene, it is known as homozygous. This is seen if both alleles are dominate or if both alleles are recessive; e.g., GG or gg. In order for a recessive gene to be expressed, the alleles must be homozygous. Step 1: --------------------------------------------------------------------- Draw the Punnett square. This is done by drawing a square, followed by a straight line up and down and another from side to side. This will quarter, or create 4 equally sized boxes within the square. Step 2: --------------------------------------------------------------------- Place the father's alleles on the top of the Punnett square with one letter above each box. Place the mother's alleles on the left hand side of the square, with one letter in front of each box. Be sure to use capital letters for the dominate genes and lower case letters for the recessive alleles. For this example, let's say this square represents the color of a flower. The father has one dominant blue and one recessive orange allele. The mother has two recessive orange alleles. Step 3: --------------------------------------------------------------------- Drop the father's alleles down into the squares and bring the mother's across. This will provide you with all possible combinations of alleles for the offspring. Each square represents a 25% chance of the offspring having that combination. If there are squares with the same cominations in them, the squares can be added together to determine the percentage. Conclusion: --------------------------------------------------------------------- From the completed square above, we can see that 50% of offspring will be blue since any dominant allele paired with a recessive one will win. There are, however, two homozygous combinations in which both genes are recessive, so 50% of the offspring will be orange. This means that half of the offspring will be blue, while the other half will be orange. Easy, right? Read more by visiting our page at: http://www.mahalo.com/how-to-draw-a-punnett-square/
Heterozygous, Homozygous, and Hemizygous. The genotype for a single gene in a diploid organism often referred to as being either homozygous, heterozygous or hemizygous. These terms are a shorthand way of describing the genotypes. ... Zygous refers to the fact that each gene in a diploid organism has two "yoked" alleles.
This video lecture explains essential genetic vocabulary Gene and allele Dominant and Recessive Allele Genotype and Phenotype Genotypic Ratio and Phenotypic Ratio Homozygous and Heterozygous Homozygote and Heterozyote
Video shows what homozygous means. Of an organism in which both copies of a given gene have the same allele. homozygous pronunciation. How to pronounce, definition by Wiktionary dictionary. homozygous meaning. Powered by MaryTTS
Video Lecture on Definition of Homozygous from Genetic Basis of Inheritance chapter of Class 12 Biology for HSC, CBSE & NEET. Watch Previous Videos of Chapter Genetic Basis of Inheritance:- 1) What Is Heredity and Variation - Genetic Basis of Inheritance - Biology Class 12 - https://www.youtube.com/watch?v=TJCiq8nlp14 2) Definition of Gene Symbols - Genetic Basis of Inheritance - Biology Class 12 - https://www.youtube.com/watch?v=6WDSYzFhs-I Watch Next Videos of Chapter Genetic Basis of Inheritance:- 1) Definition of Heterozygous - Genetic Basis of Inheritance - Biology Class 12 - https://www.youtube.com/watch?v=vTdw8K5gblA 2) Test Cross in Genetics - Genetic Basis of Inheritance - Biology Class 12 - https://www.youtube.com/watch?v=SIrh25Fl-jE Access the Complete Playlist of Biology Class 12:- http://gg.gg/Biology-Class-12th Access the Complete Playlist of Genetic Basis of Inheritance:- http://gg.gg/Genetic-Basis-of-Inheritance Subscribe to Ekeeda Channel to access more videos :- http://gg.gg/Subscribe-Now #GeneticBasisofInheritance #Biologyclass12 #class12Biology #Biologyclass12th #Biologyforclass12 #EkeedaOnlineLectures #EkeedaVideoLectures #EkeedaVideoTutorial Thanks For Watching. You can follow and Like us on following social media. Website - http://ekeeda.com Parent Channel - https://www.youtube.com/c/ekeeda Facebook - https://www.facebook.com/ekeeda Twitter - https://twitter.com/Ekeeda_Video LinkedIn- https://www.linkedin.com/company-beta/13222723/ Instgram - https://www.instagram.com/ekeeda_/ Pinterest - https://in.pinterest.com/ekeedavideo You can reach us on email@example.com Happy Learning : )
Video shows what heterozygous means. Of an organism which has two different alleles of a given gene.. heterozygous pronunciation. How to pronounce, definition by Wiktionary dictionary. heterozygous meaning. Powered by MaryTTS
Learn exactly what these different terms mean, that you will come across in genetics and cell division: Gamete, Chromosome, Gene, Allele, Dominant, Recessive, Homozygous, Heterozygous, Genotype, Phenotype, Haploid & Diploid SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. JOIN our platform at www.fuseschool.org These videos can be used in a flipped classroom model or as a revision aid. Find our other Biology videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlQYSpKryVcEr3ERup5SxHl0 Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us: http://www.youtube.com/fuseschool Friend us: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: firstname.lastname@example.org