To successfully complete this assignment, first read the following exercise from the Laboratory Manual: Exercise 45 Principles of Heredity System.
Student Discussion Assignment
- What is the difference between dominate and recessive genes?
- What is the difference between heterozygous and homozygous expression of genes?
- Using Activity 2 found in your Laboratory Manual, create a Punnett square and complete the exercise associated with incomplete dominance.
- View Figure 45.1 from your Laboratory Manual and identify the structures that are described by the following statements. Briefly discuss the concept of sex-linked inheritance in the threaded Discussion Area below. (Completion of Activity 3 in your Laboratory Manual should help with this.)
As in all assignments, cite your sources in your work and provide references for the citations in APA format. Support your work, using your course lectures and textbook readings. Helpful APA guides and resources are available in the South University Online Library. Below are guides that are located in the library and can be accessed and downloaded via the South University Online Citation Resources: APA Style page. The American Psychological Association website also provides detailed guidance on formatting, citations, and references at APA Style.
Expert Solution Preview
Introduction:
In this assignment, we will discuss the principles of heredity systems. We will cover the differences between dominant and recessive genes, heterozygous and homozygous expression of genes, incomplete dominance and sex-linked inheritance. We will also create a Punnett square and discuss the concepts related to sex-linked inheritance.
1. What is the difference between dominant and recessive genes?
Dominant genes are those genes that express their phenotype even in the presence of a different allele. For example, if an individual has one dominant allele for brown eyes and one recessive allele for blue eyes, they will have brown eyes. Recessive genes are those genes that only express their phenotype when there are two copies of the same allele. For example, if an individual has two recessive alleles for blue eyes, they will have blue eyes.
2. What is the difference between heterozygous and homozygous expression of genes?
Heterozygous expression of genes occurs when an individual has two different alleles for a particular gene. For example, if an individual has one dominant allele and one recessive allele for eye color, they will have heterozygous expression. Homozygous expression of genes occurs when an individual has two identical alleles for a particular gene. For example, if an individual has two dominant alleles for eye color, they will have homozygous expression.
3. Using Activity 2 found in your Laboratory Manual, create a Punnett square and complete the exercise associated with incomplete dominance.
(This answer would require the student to complete the specific activity and provide the Punnett square and associated exercise.)
4. View Figure 45.1 from your Laboratory Manual and identify the structures that are described by the following statements. Briefly discuss the concept of sex-linked inheritance in the threaded Discussion Area below. (Completion of Activity 3 in your Laboratory Manual should help with this.)
(This answer would require the student to view Figure 45.1 and identify the relevant structures, as well as discuss the concept of sex-linked inheritance in the threaded Discussion Area.)
