1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
levacccp [35]
3 years ago
10

A population of laboratory rats in Hardy-Weinberg equilibrium displays a polymorphism for coat color controlled by two alleles a

t a single locus. The B allele codes for black coat colour and is completely dominant. There are 200 rats in the population: 32 are white and 168 are black. How many of the black rats are heterozygous (Bb) at the coat-color locus?
Biology
1 answer:
andreev551 [17]3 years ago
5 0

Answer:

96

Explanation:

In solving Hardy-Weinberg related question, there are two formulas involved:

p + q = 1   ----------------------------- equation (1)

p² + 2pq + q² = 1 ------------------- equation (2)

where;

p is the frequency of the dominant allele.

q  is the frequency of the recessive allele.

p² is the frequency of individuals with the homozygous dominant genotype.

2pq is the frequency of individuals with the heterozygous genotype.

q² is the frequency of individuals with the homozygous recessive genotype.  

Total population of rats = 200

32 are white (bb)  = q²

168 are black (BB)  = p²

How many of the black rats are heterozygous (Bb) at the coat-color locus?

Frequency of individual (q²) = \frac{Individuals}{Total population}

Frequency of individual  (q²) = \frac{32}{200}

q² = 0.16

To find q from q²; we take the square root of the both sides

√q² = √0.16

q = 0.4

Using the first equation;

p + q = 1

p + 0.4 = 1

p = 1 - 0.4

p = 0.6

To find how many of the black rats are heterozygous (Bb) at the coat-color locus (i.e 2pq) ; we have

= 2 × p × q

= 2 × 0.6 × 0.4

= 0.48

∴ 0.48 × Total population of rats

= 0.48 × 200

= 96

Hence, there are 96 black rats that are heterozygous (Bb) at the coat-color locus

You might be interested in
How do you do this biology work
wolverine [178]

Answer:

22 pairs of autosomes, 1 pair of sex chromosomes, I notice that the X and Y chromosomes are sex chromosomes and that they are different in length and size., The sex of this organism is male, as the genotype XY can only mean a male gender; female gender is denoted by the genotype XX., You didn't put in Karyotype A., The special circumstance is with group 21 of chromosomes. There are 3 instead of 2 in that group., This circumstance results in a condition known as trisomy 21, or Down Syndrome. Down syndrome causes a distinct facial appearance, intellectual disability, developmental delays, and may be associated with thyroid or heart disease. , Name the karyotype "Down Syndrome Karyotype?" (I'm not sure on the last one)

7 0
3 years ago
I’m just a little confused can someone explain ?
Airida [17]

Basically, there is a presentation of types of food and the amount of those foods over 50 years in this graph. This means the graph is showing amounts of certain foods over the time period. I'm guessing that basing off of the the previous text you're just noting a change in the breaks of birds based off of the diet available to them at certain times. The adaptations and natural selection will explain the changes because due to certain limited and available foods the diet of the birds change.

5 0
3 years ago
Read 2 more answers
~fourth largest plate
scoray [572]

Answer:

Option (A)

Explanation:

The African plate is usually referred to as the fourth major (largest) tectonic plates that cover the continent of Africa and a portion of both the Atlantic and Indian ocean.

This plate shares a convergent plate boundary with the Eurasian plate towards its western side, where the African plate being denser subducts below the lighter Eurasian plate

It shares a boundary with the two smaller plates namely the Somalian and the Arabian plate towards its eastern side.

Thus, the correct answer is option (A).

6 0
3 years ago
Q. In which form
Sindrei [870]

➜ <u>Oxyhaemoglobin</u>.

➜ <u>Carboxyhaemoglobin</u> and as carbonic acid (CO2 dissolved in blood plasma).

5 0
3 years ago
Read 2 more answers
The genetic code consists of ____________ letter “words.”
san4es73 [151]

Answer:

The genetic code consists of <u>three</u> letter “words.”

Explanation:

I'm assuming this was what you're looking for. These "words" are known as codons: for example, AUG stands for the methionine amino acid, so that triplet of nucleotide bases leads to the Met amino acid being added to the final protein.

6 0
3 years ago
Other questions:
  • A snowstorm was predicted in Chicago. Identify the possible upper air temperature, surface temperature, and air pressure of Chic
    15·2 answers
  • Exocytosis is the process by which vesicles in the cytoplasm fuse with the cell membrane, releasing their contents into the cell
    14·1 answer
  • Identify three similarities and three differences comparing the tundra to the following enviroments: the marine, freshwater and
    8·1 answer
  • 5.which of the following organelles is the control center of a cell?
    8·1 answer
  • What is a distinguishing characteristic of a saturated fatty acid? Its molecule has the minimum number of hydrogen atoms. Its ca
    13·2 answers
  • Fever is an innate response to cellular injury and is initiated when pyrogens are released from damaged cells or certain bacteri
    5·1 answer
  • Which organic compound produced during photosynthesis is used by plants to store energy?
    11·1 answer
  • 5. Discuss the difference between emerging infectious diseases and reemerging infectious diseases. Give examples of each.
    11·1 answer
  • the river below has become two feet wider in the past ten years. which factors may have caused this change
    6·1 answer
  • Help please i will mark brainlist!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!