OBJECTIVE LIFE SCIENCE
GENETICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The dominant trait
|
|
|
The recessive trait
|
|
|
Both
|
|
|
Neither
|
Detailed explanation-1: -A dominant allele is denoted by a capital letter (A versus a). Since each parent provides one allele, the possible combinations are: AA, Aa, and aa. Offspring whose genotype is either AA or Aa will have the dominant trait expressed phenotypically, while aa individuals express the recessive trait.
Detailed explanation-2: -Which traits are controlled by single gene? Traits like eye color, freckles, ability to roll your tongue, and certain disorders like Huntington’s disease and sickle cell anemia are controlled by a single gene.
Detailed explanation-3: -Dominant alleles are seen as an uppercase of a letter; for example, B. Recessive alleles are seen as a lower case of a letter; b. In order for a person to show the dominant trait, one of the person’s parents must have the dominant trait (which is an uppercase letter).