Each physical trait is coded by genes. In addition, there are different forms of genes. What are these variations of a gene called?
These variations of a gene are called alleles.
Place the examples below in the correct columns:
TT
Tt
tt
Tallness
Shortness
Lesson 3 Page 2
Genotype
Phenotype
To summarize:
Genotype determines phenotype.
Or, we can say that the allele combinations determine the way a trait appears.
For example, TT or Tt determine tallness. The genotype, tt, determines shortness.
|| Genotype || Phenotype ||
| TT | Tallness |
| Tt | Tallness |
| tt | Shortness |
So which goes into what section
Based on the information provided, the alleles (genotype) should go into the "Genotype" column, and the physical traits (phenotype) should go into the "Phenotype" column.
Yes but which ones go there
Apologies for the confusion. Here's the correct allocation:
|| Genotype || Phenotype ||
| TT | Tallness |
| Tt | Tallness |
| tt | Shortness |
In this case, "TT" and "Tt" represent genotypes, while "Tallness" and "Shortness" are the corresponding phenotypes determined by those genotypes.
Where does tt go then
Apologies for the oversight. The correct allocation is as follows:
|| Genotype || Phenotype ||
| TT | Tallness |
| Tt | Tallness |
| tt | Shortness |
In this case, "TT" and "Tt" represent genotypes that determine the phenotype of "Tallness", while the "tt" genotype determines the phenotype of "Shortness".
Remember that dominant alleles/genes are shown with a capital letter while recessive alleles are shown with a lowercase letter.
Dominant: T
Recessive: t
Lesson 4 Page 2, 3, 6, 9
In the chart, write whether each genotype is homozygous or heterozygous.
Dominant alleles
Recessive alleles
TT
Tt
PP
Pp
tt
pp
Codes: T is tallness; t is shortness. P is purple color; p is white.
Which genotypes are dominant?
What do they have in common?
What phenotypes would be shown?
Which genotypes are recessive?
What do they have in common?
What phenotypes would be shown?