Genetics Basics: Difference between Codominance and Incomplete Dominance
Summary
TLDRIn this educational video, the concepts of incomplete dominance and codominance in genetics are explained. Incomplete dominance results in a blend of traits, exemplified by the pink snapdragon flower, a mix of white and red. Codominance, however, allows both traits to be expressed together, as seen in spotted cows and speckled chickens. The video uses simple analogies and real-life examples to differentiate between these genetic phenomena, making complex science accessible.
Takeaways
- 🌱 Genetics is the study of heredity and how traits are passed from parents to offspring.
- 👨🔬 Gregor Mendel is known as the father of genetics and conducted experiments with pea plants.
- 🌿 In Mendel's pea plant experiments, traits were either dominant or recessive, with the recessive trait being masked by the dominant one.
- 🎨 Incomplete dominance occurs when offspring display a phenotype that is a blend of the two parent phenotypes.
- 🖼️ An example of incomplete dominance is the snapdragon flower, which can display a pink color when crossed between white and red parents.
- 🐾 Another example of incomplete dominance is a pin that shows a mix of grey and blue when black and white parents are crossed.
- 🤝 Codominance is a genetic phenomenon where both alleles are expressed in the phenotype.
- 🐄 A common example of codominance is the spotted cow, which displays both white and brown patches from its parents.
- 🐔 A speckled chicken is another example of codominance, where both black and white feathers appear together.
- 🌸 The 4 o'clock plant is an example where both alleles are expressed, showing both parent traits in the offspring.
- 📈 The video aims to educate viewers on the differences between incomplete dominance (blending of traits) and codominance (cooperation of traits).
Q & A
Who is considered the father of genetics?
-Gregor Mendel is considered the father of genetics.
What did Gregor Mendel study in his experiments?
-Gregor Mendel studied pea plants and their offspring's traits.
What is the difference between complete dominance and incomplete dominance?
-In complete dominance, one trait masks the other, while in incomplete dominance, a blending of traits occurs, resulting in a third phenotype that is in between the two parental traits.
What is an example of incomplete dominance mentioned in the script?
-An example of incomplete dominance is the color of a snapdragon flower, which can be a mix between a white and red flower, resulting in a pink color.
What is codominance in genetics?
-Codominance is a genetic phenomenon where both alleles are expressed in the phenotype, and both traits appear together in the offspring.
How does the coloration of a speckled chicken illustrate codominance?
-A speckled chicken is an example of codominance because both the black and white alleles are expressed, resulting in a pattern where both colors appear together.
What is the significance of the term 'co' in codominance?
-The term 'co' in codominance signifies 'together', as in both traits work together and are expressed simultaneously in the phenotype.
What is another example of codominance provided in the script?
-Another example of codominance is the 4 o'clock plant, where both alleles are expressed, and both traits appear together.
How does the blending of traits in incomplete dominance relate to mixing colors?
-The blending of traits in incomplete dominance is likened to mixing colors, where combining two colors results in an intermediate color, such as mixing red and white paint to get pink.
What is the outcome when a white and black parent pin is crossed, according to the script?
-When a white and black parent pin is crossed, the offspring exhibits an in-between color, which is a mix of grey and blue.
What is the recommendation for viewers at the end of the script?
-The script encourages viewers to subscribe to moomoomath and share their videos, as they upload a new math and science video every day.
Outlines
🌱 Incomplete Dominance and Codominance
This paragraph introduces the concepts of incomplete dominance and codominance in genetics, contrasting them with the more commonly known Mendelian genetics where one trait masks another. It explains incomplete dominance as a blending of traits, using the analogy of mixing paint colors to illustrate how offspring can display a phenotype that is intermediate between their parents. The example of a snapdragon flower, which can display a pink color when crossed with red and white parents, is given to demonstrate this concept. Codominance, on the other hand, is described as the appearance of both parental traits in the offspring, exemplified by the spotted pattern seen in cows resulting from a cross between white and brown parents, and speckled patterns in chickens.
Mindmap
Keywords
💡Incomplete Dominance
💡Codominance
💡Gregor Mendel
💡Phenotype
💡Alleles
💡Crossing
💡Traits
💡Mixing Paints
💡Snapdragon
💡Cow
💡Speckled Chicken
Highlights
Introduction to incomplete dominance and codominance in genetics.
Gregor Mendel's work with pea plants and the concept of dominant and recessive traits.
Explanation of how traits can blend or both appear in offspring.
Definition of incomplete dominance as a blending of traits.
Example of incomplete dominance with snapdragon flowers mixing red and white to produce pink.
Inheritance of color in a pin as an example of incomplete dominance.
Definition of codominance where both traits appear together.
Codominance example with a white and brown cow producing a spotted offspring.
Explanation of the term 'co-' in codominance, meaning 'together'.
Codominance example with a speckled chicken showing both black and white feathers.
Another example of codominance in the 4 o'clock plant.
The difference between incomplete dominance (blending) and codominance (both traits appearing).
Encouragement to watch more math and science videos from moomoomath.
Invitation to subscribe and share moomoomath's educational content.
Transcripts
welcome to moomoomath and science in
this video I'd like to talk about
incomplete dominance and codominance
Gregor Mendel is the father of genetics
he is famous for his pea plants he would
cross pea plants and study the
offsprings the traits he study had to
Malia's and one would mask the other
trait however life does not always act
this way sometimes you get a mixing of
traits or both traits appear in other
words a third phenotype in this video
I'd like to talk about the difference
between incomplete dominance and
codominance with incomplete dominance
when you cross two individuals with two
different phenotypes you get a third
phenotype that is a blending you end
with end up with something that is in
between think of mixing paints if you
mix red and white you get an in-between
color which is pink blue and yellow is
green again in between here are some
real life examples the Snapdragon is a
mix between a white and red flower and
you get an in-between color which is
pink an example of incomplete dominance
this pin is the offspring of a white and
black parent and you get this in-between
color which is kind of grey and kind of
blue with codominance both traits appear
remember Co means together like
cooperate which means working together
one common example involves a white and
brown cow and you get a spotted cow
which is both white and brown a speckled
chicken is an example of codominance the
black and why elyes cooperate and both
appear together
a 4 o'clock plant is another example of
the both of the aleeah's appearing they
are cooperating and appearing together
so there we go the difference between
incomplete dominance which is blending
and codominance which is both of them
cooperating in both appearing thanks for
watching and moomoomath uploads a new
math and science video every day please
subscribe and share
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