There are different types of dominant alleles. We have studied simple dominance, now lets examine 2 exceptions to the rules.

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Presentation transcript:

There are different types of dominant alleles. We have studied simple dominance, now lets examine 2 exceptions to the rules.

What color is this horse?

The horse appears gray but if you pulled out hair to examine it is a mix of black hairs and white hairs. (1.) Codominance is when the 2 traits are dominant together but separate.

(2.) Incomplete dominance is when 2 traits mix together and can not be separated. This presents a 3 rd phenotype. Incomplete dominance is similar to when we mix 2 paints…a third color is made.

The colors of these flowers are like paint. when you cross a red with a white they mix completely to make a pink color that can not be separated again.

of dominance breed dogsTypes of dominance breed dogs

Go to presentation on Steps of Genetic Modification Genetic modification or (genetic engineering) Is used in plants and animals.

Cloning Section 13-4 Flowchart A body cell is taken from a donor animal. An egg cell is taken from a donor animal. The fused cell begins dividing, becoming an embryo. The nucleus is removed from the egg. The body cell and egg are fused by electric shock. The embryo is implanted into the uterus of a foster mother. The embryo develops into a cloned animal. Go to Section: Write these notes but leave room on 1 side

A donor cell is taken from a sheep’s udder. Donor Nucleus These two cells are fused using an electric shock. Fused Cell The fused cell begins dividing normally. Embryo The embryo is placed in the uterus of a foster mother. Foster Mother The embryo develops normally into a lamb—Dolly Cloned Lamb Egg Cell An egg cell is taken from an adult female sheep. The nucleus of the egg cell is removed. Section 13-4 Figure Cloning of the First Mammal Go to Section: