Topic 8 Assignment - Discussion explaining how to set up a monohybrid cross (using all of the appropriate PDF

Preview

Summary

Discussion explaining how to set up a monohybrid cross (using all of the appropriate terms) and what types of ratios you would expect to see (genotypic and phenotypic), and what the different types of ratios actually mean....

Description

Topic 8 Assignment Biology 101 10/28/2020 For this assignment, then, you should  explain how to set up a monohybrid cross (using all of the appropriate terms) and what types of ratios you would expect to see (genotypic and phenotypic), and  explain what the different types of ratios actually mean.

The use of a Punnett square allows an individual to predict the probability of offspring inheriting a specific trait. Monohybrid crosses are used to determine the dominance relationship between two alleles. A monohybrid is defined as the result of a cross between two true-breeding parents that express different traits for only one characteristic. Monohybrid cross is a type crossbreeding in which both parents are heterozygous (or a hybrid) for a single (mono) trait. The trait might be color of hair. First, when setting up a monohybrid cross, choose letters to represent the allelescapital for dominant, and lowercase for recessive. Write down the genotype and phenotype for each parent- both of which are homozygous. Next form the Punnett square by making a 2X2 table. Write down the alleles for parent 1 outside of the left column, and the alleles for parent 2 above the top row. Fill each box with the appropriate allele from parent 1, and then fill each box with the appropriate allele from parent 2. These boxes provide the information that will predict the outcome for the cross- the F1 generation will result in a heterozygous individual for the specific trait whereas the F2 generation will display a 3:1 phenotypic ratio. This ratio shows a 75% chance that the offspring will display the dominant allele and a 25% chance that they show the recessive allele. “Brent Cornell.” Plant Hormones | Brent Cornell, www.vce.bioninja.com.au/aos-3heredity/inheritance/monohybrid-crosses.html. Editors. “Monohybrid Cross - Definition and Examples.” Biology Dictionary, Biology Dictionary, 29 Apr. 2017, biologydictionary.net/monohybrid-cross/....