REPRODUCTION
REPRODUCTION IN ORGANISMS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Tt
|
|
|
tt
|
|
|
TT
|
|
|
T
|
Detailed explanation-1: -The notation tt means the homozygous condition, wherein the homologous pair contains same alleles of a gene. Alleles are different forms of one gene. In the pea plant, tall and dwarf are the two contrasting traits for stem height. ‘t’ is used for dwarfness, which is recessive.
Detailed explanation-2: -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-3: -So, the correct answer is D “Tt".
Detailed explanation-4: -So, the correct answer is ‘TT and tt’.
Detailed explanation-5: -Homozygous Recessive Examples If both parents have brown eyes but have a child with blue eyes, we have an example of a homozygous recessive phenotype. In this case, brown eyes are dominant. If brown eyes were recessive, all offspring would have brown eyes.