How are the plant height genotypes TT and Tt similar?(1 point) Responses Both are expressed as a short phenotype. Both are expressed as a short phenotype. Both are examples of heterozygous genotypes. Both are examples of heterozygous genotypes. Both are examples of homozygous genotypes. Both are examples of homozygous genotypes. Both are expressed as a tall phenotype.
Both are expressed as a tall phenotype.
The plant height genotypes TT and Tt are similar in that both are expressed as a tall phenotype. To understand this, we need to have some background knowledge about genetics.
In this case, the two genotypes represent the presence of a specific gene that influences plant height. The gene can have two versions or alleles, represented by T (tall) and t (short). In genetics, uppercase letters are typically used to represent dominant alleles (those that exert their effect even if only one copy is present), while lowercase letters represent recessive alleles (those that exert their effect only if two copies are present).
The genotype TT corresponds to having two copies of the tall allele, making it a homozygous genotype. This means that both alleles for the gene are the same. As a result, plants with the TT genotype will be tall, as the tall allele is dominant.
The genotype Tt corresponds to having one copy of the tall allele and one copy of the short allele, making it a heterozygous genotype. This means that the two alleles for the gene are different. In this case, the dominant tall allele will determine the phenotype, resulting in tall plants.
So, while both TT and Tt genotypes result in tall plants, they differ in terms of their genetic makeup. TT is a homozygous genotype with two dominant tall alleles, while Tt is a heterozygous genotype with one dominant tall allele and one recessive short allele.