Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele. This results in a third phenotype in which the expressed physical trait is a combination of the phenotypes of both alleles.
Incomplete dominance wasn't something i knew about. I was surprised that it wasn't that hard to learn and understand. I think its cool that you can mix genes together and one of them not completely dominate the other one. Incomplete dominance is when there are two dominant traits and they both mix together to make a new species.
Example: Incomplete dominance is seen in cross-pollination experiments between red and white snapdragon plants. In this monohybrid cross, the allele that produces the red color (R) is not completely expressed over the allele that produces the white color (r). The resulting offspring are all pink. The genotypes are: Red (RR) X White (rr) = Pink (Rr).When the F1 (first filial) generation (consisting of all pink plants) is allowed to cross-pollinate, the resulting plants (F2 generation) consist of all three phenotypes [1/4 Red (RR): 1/2 Pink (Rr): 1/4 White (rr)].
The phenotypic ratio is 1:2:1.
When the F1 (first filial) generation is allowed to cross-pollinate with true breeding red plants, the resulting plants (F2 generation) consist of red and pink phenotypes [1/2 Red (RR): 1/2 Pink (Rr)]. The phenotypic ratio is 1:1.
When the F1 (first filial) generation is allowed to cross-pollinate with true breeding white plants, the resulting plants (F2 generation) consist of white and pink phenotypes [1/2 White (rr): 1/2 Pink (Rr)].
The phenotypic ratio is 1:1
Very detailed description over the topic, and the information is very helpful. Forgot to add a picture, but overall really good job. I can also relate to the reflection because I as well thought it was cool but hard to understand.
ReplyDelete^^ -Marco Lagos
DeleteI like how you put an example to understand incomplete dominance. It helped me realize how to do it. Good job. - Alexis Rodrigues
ReplyDeleteYou did a good job explaining how the topic works with genetics by using flowers as an example. You did forget to add a picture, but I think the information makes up for it. Also, it was good how you included the phenotypic ratio while talking about the breeding of the flowers.
ReplyDeleteYou put a lot of information in this post. Incomplete dominance is often confused with co dominance. One thing you could've done is add a picture.
ReplyDelete