GENETICS AND EVOLUTION
EVOLUTION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Tt
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TTt
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tt
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tT
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Detailed explanation-1: -When an organism has two of the same alleles for a specific gene, it is homozygous (homo means “same") for that gene. An organism can be either homozygous dominant (TT) or homozygous recessive (tt). If an organism has two different alleles (Tt) for a certain gene, it is known as heterozygous (hetero means different).
Detailed explanation-2: -Thus, a purebred would result when the parents are homozygous for certain traits. A purebred of domesticated animal or a pet animal can be achieved through the process of selective breeding. For example, two dogs of the same breed would have an offspring with rather predictable traits.
Detailed explanation-3: -As the given genotype is Tt, it’s a heterozygous condition and in heterozygous condition the dominant trait (T-tall) will express itself. Hence, the phenotype of Tt will be a tall plant.
Detailed explanation-4: -▪ Genotype: The letters that make up the individual. E.g. TT or Tt. ▪ Phenotype: The physical characteristics of the particular trait. E.g. Tall or short. ▪ Dominant trait: Signified by capital letter-E.g. T.