Instances environmental factors can modify phenotype | Homework Helpers

3. Now let’s attach some meaning to genotypes. As you see from the previous problems, the genotype is an expression of the actual genetic makeup of the organism. The phenotype is the observable result of the genotype, i.e., what the organism looks like because of its genotype. Although phenotype is determined primarily by genotype, in many instances environmental factors can modify phenotype.
Human earlobes are either attached or free. This trait is determined by a single gene consisting of two alleles, F and f. An individual whose genotype is FF or Ff has free earlobes. This is the dominant condition. Note that the presence of one or two F alleles results in the dominant phenotype, free earlobes. The allele F is said to be dominant over its allelic partner, f. The recessive phenotype, attached earlobes, occurs only when the genotype is ff. In the case of complete dominance, the dominant allele completely masks the expression or effect of the recessive allele.
Suppose a man has the genotype FF. What is the genotype of his gamete (sperm) nuclei? 

Don't use plagiarized sources. Get Your Custom Essay on
Instances environmental factors can modify phenotype | Homework Helpers
Get an essay WRITTEN FOR YOU, Plagiarism free, and by an EXPERT!
Order Essay
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Choose Us

Top quality papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional academic writers

We have hired a team of professional writers experienced in academic and business writing. Most of them are native speakers and PhD holders able to take care of any assignment you need help with.

Free revisions

If you feel that we missed something, send the order for a free revision. You will have 10 days to send the order for revision after you receive the final paper. You can either do it on your own after signing in to your personal account or by contacting our support.

On-time delivery

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & confidential

We use several checkers to make sure that all papers you receive are plagiarism-free. Our editors carefully go through all in-text citations. We also promise full confidentiality in all our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.


Essay Writing Service

You are welcome to choose your academic level and the type of your paper. Our academic experts will gladly help you with essays, case studies, research papers and other assignments.


Admission help & business writing

You can be positive that we will be here 24/7 to help you get accepted to the Master’s program at the TOP-universities or help you get a well-paid position.


Editing your paper

Our academic writers and editors will help you submit a well-structured and organized paper just on time. We will ensure that your final paper is of the highest quality and absolutely free of mistakes.


Revising your paper

Our academic writers and editors will help you with unlimited number of revisions in case you need any customization of your academic papers