Mendelian Patterns of Inheritance: Incomplete Dominance and Co-Dominance Explained

The video introduces the Learning Science Channel, focusing on incomplete dominance and co-dominance in genetics. It explains how certain traits do not follow Mendelian inheritance patterns. Incomplete dominance is illustrated with a flower color example, showing intermediate phenotypes. Co-dominance is explained using cattle, where both traits are expressed. The video concludes with an interactive question to engage viewers.

What is the main focus of today's video on the Learning Science Channel?

• Incomplete dominance and co-dominance

• The structure of DNA

• The periodic table

• Newton's laws of motion

In incomplete dominance, what is the phenotype of a heterozygote?

• Intermediate phenotype

• No phenotype

• Recessive phenotype

• Dominant phenotype

What is the phenotypic ratio when a red flowered gummamela plant is crossed with a white flowered gummamela plant?

• 3:1

• 1:2:1

• 2:1

• 1:1

What is the genotypic percentage of pink flowered gummamela plants when two pink flowered plants are crossed?

• 25%

• 50%

• 75%

• 100%

Which of the following is true about incomplete dominance?

• Neither allele is expressed

• The phenotype is a blend of both alleles

• One allele is completely dominant over the other

• Both alleles are expressed equally

Which pattern of inheritance results in a third phenotype that is a combination of both parental traits?

• Recessive inheritance

• Co-dominance

• Incomplete dominance

• Complete dominance

In co-dominance, how are the alleles expressed in the phenotype?

• Both alleles are expressed equally

• Neither allele is expressed

• Only the recessive allele is expressed

• Only the dominant allele is expressed

What is an example of co-dominance in cattle?

• Red and white hairs together

• Only red hairs

• No hairs

• Only white hairs

What is the phenotypic ratio when a rowan cattle is crossed with a white cattle?

• 3:1

• 1:2:1

• 2:2

• 1:1

What is the genotypic percentage of rowan cattle when a rowan cattle is crossed with a white cattle?

• 25%

• 50%

• 75%

• 100%