Table of Contents
What do you call a combination of the dominant and recessive genes present in the cells of an organism?
The dominance or recessivity associated with a particular allele is the result of masking, by which a dominant phenotype hides a recessive phenotype. By this logic, in heterozygous offspring only the dominant phenotype will be apparent.
What is complementary gene interaction?
Complementary gene interaction is nonallelic gene interaction or epistasis where dominant alleles at heterozygous loci may complement each other by masking recessive alleles at respective loci.
What is the example of complementary gene?
In the case of a complementary gene, when two dominant genes come together to interact then Mendelian ratio 9:3:3:1 is changed to 9:7 due to the complementation of both genes. The complementary gene interaction can be found in flower colour in sweat pea with the ratio of 9:7.
What is intergenic interaction?
Intergenic interaction is shown by polygenes. This type of interaction occurs when two or more alleles of different genes present on same or different chromosomes interact to produce a cumulative effect. Multiple alleles, co-dominance and incomplete dominance are the examples of intragenic interactions.
Which is an example of blending inheritance in biology?
Blending inheritance is an obsolete theory in biology from the 19th century. The theory is that the progeny inherits any characteristic as the average of the parents’ values of that characteristic. As an example of this, a crossing of a red flower variety with a white variety of the same species would yield pink-flowered offspring.
Are there any genes that don’t blend?
Concept 3 Genes don’t blend. In general, offspring appear to be a mixture of parental characteristics. However, Mendel found that this is not true for the pea plant traits that he chose to study. Pure-bred pea plants when crossed did not produce offspring with blended traits.
Which is an example of the blending theory?
Therefore, blending truly means the blending of genes and not only phenotypes. Thus, individual alleles blend during the blending theory of inheritance. For example, blending of two flowers, one with a light colour and another with a dark colour, give rise to an intermediate coloured flower, irrespective of the colour of the two parent flowers.
What’s the difference between blending and Mendelian genetics?
Genetics is primarily divided as Mendelian Genetics and Non-Mendelian Genetics. Modern genetics is a combination of both. Blending theory is a non-Mendelian inheritance theory which proposes the mixing or blending of parent characteristics within the progeny, giving an average of the parents’ values of that characteristic.