Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

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.

problems:

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

Bacterial srnas activate and repress translation by

Bacterial sRNA's activate and repress translation by exposing or covering RBS (ribosome binding site) on mRNA. Riboswitches also activate and repress translation by exposing or covering RBS on mRNA. How do these two regu ...

Your friend bruce calls in a panic he has just come from

Your friend Bruce calls in a panic. He has just come from the doctor and been diagnosed with a bacterial infection. The doctor told him not to worry; his B cells will take care of it in no time! Knowing that you are stud ...

Assignment1 what do pollen dust mites certain foods and

Assignment 1) What do pollen, dust mites, certain foods and drugs, insect venom, fungal spores, and some ingredients in cosmetics have in common? they often contain dangerous bacteria they often act as allergens they all ...

How do gap junctions function with the intercellular

How do gap junctions function with the intercellular diffusion of sodium

Can geneticists accurately predict the possibility of the

Can geneticists accurately predict the possibility of the inheritance of a genetic disease? Why or why not?

What are the steps in the process of creating a safe

What are the steps in the process of creating a safe schools/health student initiative?

In essay form a identify discuss and explain at least 4

In essay form a) Identify, discuss and explain at least 4 actions that can result in changes in chromosome structure. b) Explain why changes in nucleotide sequence could result in the production of different proteins. Be ...

A 74-year-old woman is transported to a regional burn

A 74-year-old woman is transported to a regional burn center after being rescued from a house fire. Apparently, a space heater was knocked over and an area rug caught fire. The fire quickly spread throughout the house. S ...

Elisa uses an enzyme-linked antibody to detect and antigen

ELISA uses an enzyme-linked antibody to detect and antigen. Briefly explain how use of the enzyme is ELISA could amplify the detection of a very small amount of antigen in a sample.

Identical twins jan and fran were very close sisters so

Identical twins Jan and Fran were very close sisters. So when Jan died suddenly, Fran moved in to help take care of Jan's daughter (her neice), Millie. Some time later Fran married her brother in law and became Millie's ...

  • 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