When you see a dominant trait, the underlying genetic make-up can still be ambiguous. See how researchers use test crosses to find out the genotype behind the phenotype. The test cross is another ...

Genetic crosses involving single genes (monohybrid inheritance) can be shown and examined using Punnett squares. The tall allele is dominant and is shown as T. The small allele is recessive and is ...

Early use of the test cross was as an experimental mating test used to determine what alleles are present in the genotype. An organism's genetic makeup is called its genotype, and it reflects all ...

Using single-cell RNA sequencing, we mapped thousands of expression quantitative trait loci in yeast, including a variant in GPA1 that influences gene expression, cell-cycle occupancy, and mating ...

This means that all the offspring produced will be tall. In this genetic cross, Parent 1 is still tall but is heterozygous with alleles Tt. Parent 2 is short and is homozygous with alleles tt.