LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

GENETICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A red lily crossed with a yellow lily produces heterozygous orange lily flowers. This is an example of which type of inheritance?
A
Codominance
B
Incomplete Dominance
C
Sex Linked
D
Polygenic Trait
Explanation: 

Detailed explanation-1: -This condition is called incomplete dominance. Let us assume that red flowers have genotype RR and yellow flowers have genotype rr. All progenies in the F1 generation will have Rrgenotype. Since red colour fails to completely dominate the yellow colour; all plants in F1 generation produce orange flowers.

Detailed explanation-2: -Examples of codominance in animals include speckled chickens, which have alleles for both black and white feathers, and roan cattle, which express alleles for both red hair and white hair. Codominance is also seen in plants.

Detailed explanation-3: -Codominance and Incomplete dominance are two types of genetic inheritance. Codominance essentially means that no allele can block or mask the expression of the other allele. On the other hand, incomplete dominance is a condition in which a dominant allele does not completely mask the effects of a recessive allele.

Detailed explanation-4: -This pattern of inheritance is described as incomplete dominance, meaning that neither of the alleles is completely dominant over the other: both alleles can be seen at the same time. The allele for red flowers is incompletely dominant over the allele for white flowers. Red + white = pink.

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