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

Define nonrenewable resources and identify four examples

Define nonrenewable resources and identify four examples (only one energy source allowed).

The primary goal of the reproductive system is the

The primary goal of the reproductive system is the production of a new human being. Let's consider each step of that process, beginning with the formation of gametes (sperm and eggs) and ending with birth. Can someone st ...

Biology1 what is the difference of fatty acid beta

Biology 1. What is the difference of fatty acid β oxidation in mitochondrion versus peroxisome? Why such a difference exists? 2. (a) Write down the structure of arachidonic acid (C20:4 Δ5,8,11,14). (b) What do you expect ...

One major trend in the world today is green technology

One major trend in the world today is "green technology". Green technology is basically a term to encompass environmentally friendly technologies and inventions. Topic:  In this discussion board provide us with a link to ...

Color blindness is an x-linked recessive trait a

Color blindness is an X-linked recessive trait. A color-blind man has a daughter with normal color vision. The daughter marries a man who has normal color vision. What is the expected phenotypic ratio of their children? ...

Plants pend towards the source of of light on account of

Plants pend towards the source of of light on account of the movement curvature called?

1which group of algae appears to be the most closely

1. Which group of algae appears to be the most closely related to the ancestors of true plants? Name one feature that appears to be homologous. 2. What are microphylls and which group of seedless vascular plants are they ...

The lac operator binds the lac repressor the dna sequence

The lac operator binds the lac repressor. The DNA sequence of the lac operator shares a characteristic with the DNA sequences of the binding sites of many restriction enzymes. What is this common characteristic?

Give an example of pairs that can be mixed together to make

Give an example of pairs that can be mixed together to make a budget solution?

Due to the prospect of interplanetary travel how would you

Due to the prospect of interplanetary travel, how would you attempt to Isolate and identify a bacterial infection acquired on another planet. This bacteria is unknown to use and does not appear in Bergey's or the Manuel ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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