Genetics in Action: Incomplete Dominance

In 1900, Karl Correns discovered that the traditional principles of dominance and recessiveness in genetics do not always apply. Through his experiments with four o'clock flowers, he found that crossing purebred red and white flowers resulted in pink offspring, demonstrating incomplete dominance. This concept also applies to animals, as seen in the breeding of chestnut brown and creamy white horses, producing Palomino horses. Correns' work highlighted that some gene pairs do not follow the typical dominant-recessive pattern.

What significant discovery did Karl Correns make in 1900 regarding genetic inheritance?

• The theory of natural selection

• The idea of incomplete dominance

• The concept of genetic mutation

• The principle of complete dominance

What was the result when Karl Correns crossed a purebred red four o'clock flower with a purebred white one?

• Purple flowers

• Pink flowers

• White flowers

• Red flowers

Which of the following is an example of incomplete dominance in plants?

• A red and white flower producing yellow flowers

• A red and white flower producing pink flowers

• A red and white flower producing white flowers

• A red and white flower producing red flowers

In the context of incomplete dominance, what color are the offspring when a purebred chestnut brown horse is bred with a purebred creamy white horse?

• Chestnut brown

• Creamy white

• Golden brown

• Black

What is the term used to describe the golden brown horses resulting from the breeding of chestnut brown and creamy white horses?

• Mustang

• Palomino

• Clydesdale

• Appaloosa