Worksheet

Incomplete Dominance Genetics Worksheet Answer Key

Incomplete Dominance Genetics Worksheet Answer Key
Incomplete Dominance Worksheet

Incomplete Dominance Genetics Worksheet

Incomplete dominance is a phenomenon in genetics where one allele does not completely dominate another allele, resulting in a blending of the two traits. This concept is essential in understanding the genetics of inheritance and the expression of traits in organisms.

Understanding Incomplete Dominance

Incomplete dominance occurs when the effect of one allele is not completely masked by the effect of the other allele. This results in a heterozygous individual expressing a trait that is a combination of the two alleles. For example, when a red flower (RR) is crossed with a white flower (rr), the offspring (Rr) may have pink flowers, which is a blend of the two parental traits.

Key Concepts in Incomplete Dominance

  • Incomplete dominance: A phenomenon where one allele does not completely dominate another allele, resulting in a blending of the two traits.
  • Heterozygous: An individual with two different alleles for a particular gene.
  • Homologous chromosomes: Chromosomes that have the same genes in the same positions.
  • Alleles: Different forms of a gene.

Examples of Incomplete Dominance

  • Red flowers (RR) x White flowers (rr) = Pink flowers (Rr)
  • Tall plants (TT) x Short plants (tt) = Medium plants (Tt)
  • Black hair (BB) x Blonde hair (bb) = Brown hair (Bb)

Genotype and Phenotype in Incomplete Dominance

Incomplete Dominance Worksheet With Answers
Genotype Phenotype
RR Red flowers
Rr Pink flowers
rr White flowers

How to Determine Incomplete Dominance

  1. Cross two parents: Cross two parents with different alleles for a particular gene.
  2. Determine the genotype: Determine the genotype of the offspring by combining the alleles from each parent.
  3. Determine the phenotype: Determine the phenotype of the offspring based on the genotype.

Worksheets and Answer Keys

Complete the following worksheets and check your answers with the answer key.

Worksheet 1

  1. What is incomplete dominance? _____________________________________________________
  2. What is the genotype of an individual with pink flowers? _____________________________________________________
  3. What is the phenotype of an individual with the genotype Rr? _____________________________________________________

Answer Key

  1. Incomplete dominance is a phenomenon where one allele does not completely dominate another allele, resulting in a blending of the two traits.
  2. Rr
  3. Pink flowers

Worksheet 2

  1. What is the genotype of an individual with medium plants? _____________________________________________________
  2. What is the phenotype of an individual with the genotype Tt? _____________________________________________________
  3. What is the genotype of an individual with black hair? _____________________________________________________

Answer Key

  1. Tt
  2. Medium plants
  3. BB

Worksheet 3

  1. What is the phenotype of an individual with the genotype Bb? _____________________________________________________
  2. What is the genotype of an individual with white flowers? _____________________________________________________
  3. What is the phenotype of an individual with the genotype rr? _____________________________________________________

Answer Key

  1. Brown hair
  2. rr
  3. White flowers

👉 Note: The worksheets and answer keys are designed to test your understanding of incomplete dominance genetics. Make sure to review the key concepts and examples before completing the worksheets.

In conclusion, incomplete dominance is an essential concept in genetics that helps us understand how traits are expressed in organisms. By completing these worksheets and reviewing the answer key, you should have a better understanding of how incomplete dominance works and how to determine the genotype and phenotype of individuals.

What is incomplete dominance?

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Incomplete dominance is a phenomenon where one allele does not completely dominate another allele, resulting in a blending of the two traits.

What is the genotype of an individual with pink flowers?

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Rr

What is the phenotype of an individual with the genotype Tt?

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Medium plants

Related Terms:

  • Incomplete dominance Worksheet With answers
  • Incomplete and codominance Worksheet
  • Codominance Worksheet with answers
  • Codominance Worksheet with answers pdf

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