Explain the test - cross. I have to explain the usefullness of the test-cross. I had my paper written then was told I need to incorporate the Punnett square, monohybrid cross, dihybrid cross etc. into the paper. I am now confused - maybe I have just researched so much I cannot make sense of any of it. How is the Punnett Square, test cross, monohybrid cross, dihybrid cross all tied in together?© BrainMass Inc. brainmass.com December 15, 2020, 11:13 am ad1c9bdddf
Let's start with simple definitions for these terms (from http://www.thefreedictionary.com):
Punnett Square-Â A method for predicting the ratios of phenotypes in offspring, given the phenotypes and/or genotypes of the parents. Generally, the alleles of two or fewer genetic loci are worked with per square.
Test cross- a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring.
monohybrid cross- hybridization (breeding) using ...
Definitions and relation between test crosses, monohybrids, dihybrids and Punnett squares.