A heterozygous red-fruited tomato is crossed with a homozygous one. Identify offspring

A heterozygous red-fruited tomato is crossed with a homozygous one. Identify offspring by genotype and phenotype if red dominates over yellow.

Let’s designate the gene that causes the red color of fruits in tomatoes as L, then the gene that causes the yellow color of fruits will be designated as l.

A heterozygous tomato will have the Ll genotype and produce two types of germ cells – l and L.

Both a red-fruited tomato and a yellow-fruited tomato can be homozygous. Let’s consider both options.

Let’s say a homozygous tomato has red fruits. Then its genotype is LL and it produces germ cells L. When crossed with a heterozygous plant Ll, the offspring will be represented by two genotypic variants of red-fruited tomatoes: LL – 50%; Ll – 50%.

Let’s say a homozygous tomato has yellow fruits. Then his genotype is ll and he produces germ cells l. The offspring from crossing with a heterozygous tomato Ll will be represented by the following options:

homozygous tomatoes with yellow fruits (ll) – 50%;

heterozygous tomatoes with red fruits (Ll) – 50%.