Ask Biology Expert

problem 1) What are the two main causes of heritable variation?

problem 2) Classify the following variations as either

(i) caused entirely by genetic effects or                    

(ii) caused by a combination of genetic and environmental effects.

obesity, eye colour, tallness, ability to sing, maleness, masculinity, blood group, natural hair colour; sickle-cell anaemia, agility

problem 3) Alleles are genes which occupy corresponding positions on….. A ….. chromosomes. They control the same ….. B ….. but not necessarily in the same way.

problem 4)(a) What new combinations of characteristics might arise in the offspring when a tall plant with white flowers is crossed with a dwarf plant (of the same species) with red flowers?

(b) What selective advantage might either of the new varieties have?

problem 5) The genotypes of two guinea pigs, for two characteristics are  represented as AABB and aabb. These guinea pigs are mated, and their offspring eventually mate with each other.

(a) What genotypes could emerge in the second generation?

(b) Which of these would be phenotypically different (i.e. be different in appearance) from the original pair?

problem 6) Suppose that there are six pairs of alleles which control height and that each dominant allele adds 5cm to the stature. Suppose also that the average height of an adult (with equal numbers of recessive and dominant alleles) is 160cm

(a) What is

(i) the tallest,

(ii) the shortest person you would expect from this pattern?

(b) On this basis, what would be the minimum difference in height between any two people?

(c) Why is this minimum difference unlikely to be observed in reality?

problem 7) Give two exs in each case of (a) continuous, (b) discontinuous variation in human populations. 

problem 8) Which one of the following statements is the least accurate?

(a) Discontinuous variation results entirely from genetic differences.

(b) Continuous variation can result from genetic differences.

(c) Discontinuous variation cannot be altered by environmental effects.

(d) Continuous variation results from environmental effects.

problem 9) describe why identical twins will have the same genotype.

problem 10) When  ….. A ….. and …..  B ….. put forward the theory of Natural Selection in 1858 they observed that there are ….. C ….. between  the individuals of a species. They also observed that organisms produce more offspring than can possibly …. D …..to maturity. If the ….. E ….. are inherited and give the individuals an advantage over the other members of the species, they will live ….. F ….. and so leave more offspring with the same beneficial ….. G …..

Biology, Academics

  • Category:- Biology
  • Reference No.:- M95200

Have any Question?


Related Questions in Biology

Case study question -case study - mary 21 years old

Case Study Question - Case Study - Mary, 21 years old, presented to the hospital emergency department with an infected laceration on her left foot. Mary was at a beach resort four days ago, when she trod on a broken glas ...

Assignment -the upper-case blue letters are the 14th exon

Assignment - The upper-case, blue letters are the 14th exon (of 20) in the Hephl1 gene in mice. The lower-case (black) letters are from the flanking introns.  The highlighted bases indicate primers that may be used to ge ...

Question - a pure strain of mendels peas dominant for all

Question - A pure strain of mendel's peas, dominant for all seven of his independently assorting genes, was testcrossed. How many different kinds of gametes could the F1 PRODUCE?

Igfbp2 rbp4 and factor d post bariatric surgeryigfbp2 what

IGFBP2/ RBP4 and Factor D Post Bariatric Surgery IGFBP2 ( what the normal physiological action in the body? And how it affectedby obesity? andpost bariatric surgery?) RBP4 (what the normal physiological action in the bod ...

Assignment on nutrition - q1 task you need to select 2

Assignment on Nutrition - Q1. Task: You need to select 2 different age groups of your choice. You will need to plan balanced meals with snacks for a day. Once you have laid out the meal plan you need to: Explain why the ...

Question - gene cloning a please write the steps to clone

Question - Gene Cloning a) Please write the steps to clone the protease gene from Bacillus strain whose genome sequence is not known. b) Express the protease gene to obtain the enzyme in high yield, please plan your prot ...

Instructions address each question below as it relates to

Instructions: Address each question below as it relates to the caw study given. A patient was brought to the Emergency Department by ambulance with two arrow wounds. One arrow is still in the patient on the left side; en ...

Use of molecular tools and bioinforrnatics in the diagnosis

Use of Molecular Tools and Bioinforrnatics in the Diagnosis Characterization of Enteric Pathogens from a Case Study Purpose: The purpose of this project is to familiarize the student with modern molecular tools and bioin ...

Experiment 1 staining video1 open the media player by

Experiment 1: Staining Video 1. Open the Media Player by clicking on the film-strip button in the lower left of the lab's window frame, as shown below. The Media Player is a repository of images, videos, saved snapshots, ...

Chosen dr jan nolta- stem cell researcher head of uc davis

Chosen Dr. Jan Nolta- Stem Cell Researcher Head of UC Davis Stem Cell Program Director Topic Background: early Stem cells have the ability to develop into many different types of cells. Stem Cell Research is not without ...

  • 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

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As