Explore BrainMass
Share

Description of Mendelian Genetics

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

1.Define dominance, recessiveness and sex-linkage.
2.What are the expected phenotypic ratios for a monohybrid cross, dihybrid cross, and sex-linked trait?
3. What is pedigree analysis? How can pedigree analysis be used to predict the phenotype of offspring?

© BrainMass Inc. brainmass.com October 24, 2018, 10:26 pm ad1c9bdddf
https://brainmass.com/biology/genetics/description-of-mendelian-genetics-159367

Solution Preview

1.Dominance: It is a condition wherein, a gene expresses itself by suppressing the expression of its counterpart. For instance, the gene for tallness is expressed by suppressing the gene for dwarfness. Thus, dominance is conventionally represented as 'T'. Recessiveness: It is a condition wherein, a gene is not expressed in the presence of the dominant gene. For instance, the gene for dwarfness is expressed only in the absence of the dominant gene. Thus, recessiveness is conventionally represented as 't'. Sex - linkage: The inheritance of body characters or traits, which are controlled by genes present on the sex chromosomes is known as sex-linkage. By convention, X-linked inheritance or X-linkage is commonly known as sex-linkage. It is the mode of inheritance of the characters ...

Solution Summary

Dominance is a condition wherein, a gene expresses itself by suppressing the expression of its counterpart. Recessiveness is a condition wherein, a gene is not expressed in the presence of the dominant gene. The inheritance of body characters or traits, which are controlled by genes present on the sex chromosomes is known as sex-linkage.

$2.19
See Also This Related BrainMass Solution

Description of the Structure of DNA

Describe the structure and function of DNA as the molecule of inheritance.

I need a better understanding of the below:

a. Describe the structure of DNA.
b. Discuss how the structure of DNA allows it to serve as the basis for inheritance.
c. Examine how meiosis allows DNA to be divided into gametes.
d. Describe how this relates to Gregor Mendel's patterns of inheritance.

View Full Posting Details