Ask Question, Ask an Expert


Ask Biology Expert

Complete all three parts and answer all problems. Remember to turn in Punnett Square for Part 2.

Part 1: Genetics - From Genes to Proteins, Mutations

Overview: Genetic information in DNA is transcribed to RNA and then translated into the amino acid sequence of a Protein.

A) Step 1 - Transcription: During the process of transcription, the information in the DNA codons of a gene is transcribed into RNA.

Suppose that gene X has the DNA base sequence 3'-TACCCTTTAGTAGCCACT-5'.

problem: What would be the base sequence of RNA after transcription occurs? Turn this in.

(In this particular ex, assume that the RNA product does not require processing to become mRNA. In other words, the transcribed RNA becomes the mRNA sequence.)

B) Step 2 - Translation: During protein synthesis at the ribosome, the base sequence of the mRNA codons is translated to the amino acid sequence of a protein.

problem: Using the mRNA that you transcribed above, use the genetic code table to determine the resulting amino acid sequence? Turn this in.

And, turn in the answer to these problems:

What is the significance of the first and last codons? What meaning do these codons have for protein synthesis?

C) Mutations: A mutation is defined as a change in the base sequence of DNA. This may occur as a "mistake" in DNA replication, for ex.

Suppose that during DNA replication, two mutant DNA sequences are produced as shown below.

For the 2 mutated DNA sequences, you will investigate how these changes might affect the sequence of amino acids in a protein.

problem: For each of the two, you will need to first transcribe the mRNA, and then use the genetic code table to determine the amino acid sequence.

Turn these in, and state whether the protein sequence changes for each.

problem: Then, describe why a change in amino acid sequence might affect protein function. Turn in your answer.

Here is the original sequence, followed by two mutated sequences, 1 and 2:

Original sequence 3'- TACCCTTTAGTAGCCACT-5'

Mutated sequence 1) 3'-TACGCTTTAGTAGCCATT-5'

Mutated sequence 2) 3'-TAACCTTTACTAGGCACT-5'.

Part 2: Inheritance of Traits or Genetic Disorders (Chapter 12)

Bob and Sally recently married. Upon deciding to plan a family, both Sally and Bob find out that they are both heterozygous for cystic fibrosis, but neither of them has symptoms of the disorder.

Set up and complete a Punnett Square for cystic fibrosis for this couple; turn in the Punnett square.

When doing the Punnett Square, C = normal allele; and c = allele for cystic fibrosis.

Note: You can use the Table function in MS Word to create and fill in a Punnett Square.


Based on the Punnett square, find out chances (percentages) for having a healthy child (not a carrier), a child that is a carrier for the cystic fibrosis trait, and a child with cystic fibrosis? Turn in these percentages.

Part 3: Cell division, sexual reproduction and genetic variability (Chapter 11)

Eukaryotic cells can divide by mitosis or meiosis. In humans, mitosis produces new cells for growth and repair; meiosis produces sex cells (gametes) called sperm and eggs.

Although mutations are the ultimate source of genetic variability, both meiosis and sexual reproduction also can contribute to new genetic combinations in offspring.

problem: How do both meiosis and sexual reproduction (fertilization) produce offspring that differ genetically from the parents? Be sure to talk about steps in meiosis that increase variability as well as the process of fertilization.

Completed Punnett Square and Answers to all problems. Parts 1, 2 and 3 sorry guys i dont even know what this is please help me i am going crazy

Biology, Academics

  • Category:- Biology
  • Reference No.:- M927296

Have any Question? 

Related Questions in Biology

Social unrest in west africa where sickle cell anemia is

Social unrest in West Africa, where Sickle cell anemia is most common, is forcing people to migrate to other countries. As a result, sickle cell anemia cases are rising in Europe and the US in recent years. Is the US pop ...

What type of reproduction uses part of a plant body becomes

What type of reproduction uses part of a plant body becomes separated off to give rise to new individuals?

For this assignment continue to write about the current

For this assignment, continue to write about the current organization you work for or one that you worked for in the past. Before writing this paper, make sure to thoroughly review the background readings. Think carefull ...

The plasma membranes of polarized epithelial cells such as

The plasma membranes of polarized epithelial cells, such as those found in thetubules of the nephrons in the kidney, are divided into apical and basolateraldomains. How are these two domains different and how do the diff ...

You are an employee of an us firm that produces personal

You are an employee of an U.S. firm that produces personal computer in Thailand and then exports them to the United States and other countries for sale.  The personal computers were originally produced in Thailand to tak ...

The m and n factors are glycoproteins that are found on the

The M and N factors are glycoproteins that are found on the surface of red blood cells antigens, The M and N factors do not cause antibody reactions in human blood transfusions. People with type M blood are homozygous fo ...

Topic systemic pathophysiology of the respiratory and

Topic: Systemic Pathophysiology of the Respiratory and Gastrointestinal Systems Objective: Discuss a disease, condition or syndrome affecting the cardiovascular system and current research, events, or interesting facts a ...

1 much pharmaceutical research targets developing

1. Much pharmaceutical research targets developing anti-cancer drugs that can effectively stimulate the methylation of DNA. Formulate a possible hypothesis to explain why DNA methylation might be an effective anticancer ...

Discuss the need for modern society to shift to a paradigm

Discuss the need for modern society to shift to a paradigm of Sufficiency, within which just and sustainable wellbeing for all of creation becomes the norm. How can this be achieved on an Earth That Is Full? Include cons ...

John has difficulty swallowing loss of taste sensation in

John has difficulty swallowing, loss of taste sensation in the posterior one-third of the right half of his tongue, and decreased salivation, especially on the right side. Describe the sensory portion of the affected neu ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen