Understanding Monohybrid and Dihybrid Crosses in Genetics

What's the difference between monohybrid and dihybrid crosses?

Monohybrid crosses involve one gene; dihybrid crosses involve two genes

The main difference between monohybrid and dihybrid crosses is that monohybrid crosses involve one gene, while dihybrid crosses involve two genes.

In a monohybrid cross, two organisms are crossed that differ in one gene. The offspring of this cross will show a 3:1 phenotypic ratio, with 3/4 of the offspring showing the dominant phenotype and 1/4 of the offspring showing the recessive phenotype.

In a dihybrid cross, two organisms are crossed that differ in two genes. The offspring of this cross will show a 9:3:3:1 phenotypic ratio, with 9/16 of the offspring showing the dominant phenotype for both genes, 3/16 of the offspring showing the dominant phenotype for one gene and the recessive phenotype for the other gene, 3/16 of the offspring showing the recessive phenotype for one gene and the dominant phenotype for the other gene, and 1/16 of the offspring showing the recessive phenotype for both genes.

Monohybrid crosses are simpler than dihybrid crosses because they only involve one gene. This means that there are only two possible phenotypes for the offspring, and the phenotypic ratio is easier to predict. Dihybrid crosses are more complicated because they involve two genes, which means that there are four possible phenotypes for the offspring. The phenotypic ratio for dihybrid crosses is also more complicated, and it can be more difficult to predict.

However, dihybrid crosses can provide more information about the inheritance of genes. For example, by studying the phenotypic ratio of the offspring of a dihybrid cross, it is possible to determine if two genes are linked or not. Linked genes are genes that are located on the same chromosome, and they tend to be inherited together. Unlinked genes are genes that are located on different chromosomes, and they are more likely to be inherited independently of each other.

What's the difference between monohybrid and dihybrid crosses?

Monohybrid crosses involve one gene; dihybrid crosses involve two genes

The main difference between monohybrid and dihybrid crosses is that monohybrid crosses involve one gene, while dihybrid crosses involve two genes. The correct answer is Monohybrid crosses involve one gene; dihybrid crosses involve two genes. Option 1 is correct.