Question

Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents?
A. Incomplete dominance
B. Law of dominance
C. Inheritance of one gene
D. Codominance

Answer 1

Dominance is a relationship between two factors of one gene sequence that have an effect on the constitution of 1 allele and masks the contribution of another allele. In incomplete dominance, the progeny is different from the parent while in the law of dominance the dominant allele masks the recessive one. Inheritance of one gene is based on a single trait cross while in codominance both alleles have an equal effect.

Complete step-by-step answer: According to the principle of dominance when there are two genes in an organism one of the two genes masks the presence of the other gene. In simpler words that gene is dominant over the other gene and stops the other gene from expressing.
Let us look at all the options to get the correct answer,
-Incomplete dominance: Once there's no alikeness of F1 relative with any of the parent rather F1 relative has the intermediate constitution.
-Law of dominance: In heterozygous genotype, one factor expresses itself phenotypically and an alternative factor remains unverbalized or unexpressed. The factor that expresses is termed Dominant factor whereas the opposite factor that remains unexpressed is outlined as a recessive factor. The Law of dominance holds true once the opposite factor is recessive and therefore the heterozygous F1 generation resembles a solely dominant parent.
-Inheritance of one gene: Genetic characteristics are controlled by combining alleles. Alleles of the first character segregate during gamete formation. A gamete receives one factor or allele of the pair.
-In codominance, the resulting progeny inherits the characters of each of the parents as a result of neither of the alleles present is recessive and each the alleles specific their constitution within the heterozygous condition. It is the condition within which F1 relatively resembles each of the parents in the constitution. Let’s take an example of a cross between red flowers and white flowers of Camellia (which is bush) that can lead to flowers that have red and white flecks. The other example is the Human AB blood type.
So, the right answer is option D which is 'Codominance'.

Note: The blood grouping is also an example of multiple allelism as two various varieties of factors (also called alleles) found on a specific locus are thought-about because of the multiple alleles. It's fashioned as a result of recurrent mutation of constant alleles however in different directions.