Determining Genotype of Peach Plant with Golden Fruit and Wide Leaves

How can we determine the genotype of a peach plant with golden fruit and wide leaves?

What would be the best way to determine the genotype of a plant with a golden fruit and wide leaves?

Answer:

The best way to determine the genotype of a peach plant with a golden fruit and wide leaves, both of which are dominant traits, is via a Test Cross. In a test cross, the plant in question (with golden fruit and wide leaves) is crossed with a plant that is homozygous for the recessive traits (red fruit and thin leaves).

To determine the genotype of a peach plant with golden fruit and wide leaves, we use a test cross method. This involves crossing the plant in question (with the dominant traits) with a plant that carries the recessive traits.

In this case, the allele for golden fruit is dominant over red fruit, and the allele for wide leaves is dominant over thin leaves. This means that the peach plant with golden fruit and wide leaves could have a genotype of GGWW (homozygous dominant) or GgWw (heterozygous dominant).

By crossing this peach plant with another plant that is homozygous recessive for red fruit and thin leaves (ggww), we can determine the genotype based on the offspring produced. If all offspring display only golden fruit and wide leaves, then the peach plant is likely homozygous dominant (GGWW). However, if any offspring show red fruit or thin leaves, then the peach plant is likely heterozygous (GgWw).

Therefore, the test cross method is a valuable tool in genetics for determining the genotype of an organism expressing a dominant phenotype but with uncertain genotype. It allows us to deduce the presence of recessive alleles in the genotype of the organism.