Ina genetics laboratory, two heterozygous tall plants (Ts) are crossed. If tall (T) is dominant over short (t), What are the expected henotypic results?
A.) 25% tall, 75% short
B.) 50% tall, 50% short
C.) 100% tall
D.) 75% tall, 25% short
The correct answer is B.) 50% tall, 50% short.
When two heterozygous tall plants (Ts) are crossed, the possible genotypes of the offspring are: TT, Ts, Ts, and tt.
The genotype TT represents a homozygous dominant tall plant, Ts represents a heterozygous tall plant, and tt represents a homozygous recessive short plant.
The phenotype of TT and Ts individuals is tall, while the phenotype of tt individuals is short.
Since tall (T) is dominant over short (t), individuals with the genotypes TT and Ts will both exhibit the tall phenotype.
Therefore, 50% of the offspring will have the tall phenotype, and 50% will have the short phenotype.