A dark-red strain and a white strain of wheat are crossed and produce an intermediate, medium-red F₁. When the F₁ plants are interbred, an F₂ generation is produced in a ratio of 1 dark-red: 4 medium-dark-red: 6 medium-red: 4 light-red: 1 white. Further crosses reveal that the dark-red and white F₂ plants are true breeding

Assign symbols to these alleles, and list possible genotypes that give rise to the medium-red and light-red phenotypes.

Video transcript

Hi, everyone. Let's take a look at this practice problem together. The amount of phenotypic variation in a population that can be attributed to individual genetic differences is referred to as blink. The answer options are a quantitative trait. B, heritability. C maternal effect and D none of the above. Now recall that phenotypic variation is simply that it's the variety of phenotypes that can be observed in a population. So let's identify the word that describes the amount of phenotypic variation. We'll start with option a quantitative trait. Now recall that a quantitative trait is also known as a complex trait. It's a trait that has variable phenotypic expression in the general population. This is a trait with phenotypic variety, not a term that describes the amount of phenotypic variation. So option A is incorrect. Option. C maternal effect is the mother's genotype determines the offsprings phenotype. This is not the correct answer either. So we can eliminate choice c choice B heritability. Now, despite the common use of heritable, where we think of it as traits that are passed down from one generation to the next. This is a measurement or a statistic that estimates phenotypic variation in a population due to the genetic variations in the individuals it's commonly used in breeding genetics. So the correct answer is option B heritability. All right, everyone. I hope you found this helpful and I'll see you soon for the next practice problem.