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
kicyunya [14]
3 years ago
11

Suppose the human trait for freckles is controlled by a simple dominant and recessive relationship at one locus. Freckles, F, is

the dominant allele, and a lack of freckles, f, is the recessive allele. In a college genetics class, the professor takes a tally of students who have freckles and of students with a lack of freckles. In this class of 123 students, 98 have freckles. Calculate the frequency of the dominant allele, F, and the heterozygous genotype Ff. Express the frequencies in decimal form rounded to the nearest thousandth. Assume the class is in hardy-Weinberg equilibrium for this trait.
Biology
1 answer:
Dennis_Churaev [7]3 years ago
5 0

Answer:

0.549 is the frequency of the F allele.

0.495 is the frequency of the Ff genotype.

Explanation:

<em>FF </em>or <em>Ff</em> genotypes determine freckles, <em>ff</em> determines lack of freckels.

In this class of 123 students, 98 have freckles (and 123-98= 25 do not).

If the class is in Hardy-Weinberg equilibrium for this trait, then the genotypic frequency of the ff genotype is:

q²= 25/123

q²=0.203

q= \sqrt{0.2

q= 0.451

<em>q </em>is the frequency of the recessive f allele.

Given <em>p</em> the frequency of the dominant F allele, we know that:

p+q=1, therefore p=1-q

p=0.549 is the frequency of the F allele.

The frequency of the Ff genotype is 2pq. Therefore:

2pq=2×0.549×0.451

2pq=0.495 is the frequency of the Ff genotype.

You might be interested in
The transfer of energy through empty space is called
Alex777 [14]

Answer:

The transfer of energy through empty space is called convection.

Explanation:

One of the fundamental laws of the universe is the conservation of energy. Energy can't be created and it can't be destroyed. Convection can be the process by which heat is transferred . Temperature is known as  the basic principle of heat transfer. The amount  that how much of thermal energy can be available is determined by the temperature, and the heat flow represents movement of thermal energy.

3 0
2 years ago
Read 2 more answers
A dog has a mass of 12 kg. what is its weight
Doss [256]
Using W=mg

12*10 m/sec squared
10 m/sec squared = 100
100*12
=
1,200 newtons
4 0
2 years ago
Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts,
ICE Princess25 [194]

Answer:

Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts, and the second cell has very few. What would most likely characterize these cells? The second cell would not be able to produce as much food because it could not capture sunlight

8 0
2 years ago
Pollen is produced in the anthers, which are the _______ organs of flowers.'
Vilka [71]

The correct answer is male.

4 0
3 years ago
Read 2 more answers
State any two human activities that have a direct impact on soil formation​
olganol [36]

Answer:

<em>Nonetheless, some human activities have clear direct impacts. These include land use change, land management, land degradation, soil sealing, and mining. ... This in turn leads to loss of soil carbon and other nutrients and to changes in soil properties and in soil biodiversity.</em>

6 0
2 years ago
Other questions:
  • Can someone answer this question please answer it correctly if it’s corect I will mark you brainliest
    6·1 answer
  • Leaves and dams are beneficial to farmlands because they
    14·1 answer
  • 1. In what ways you could increase the rate of reaction as it is taking place in the
    14·1 answer
  • The picture shows fruit produced by two parents and fruit produced by one of their offspring
    7·2 answers
  • PLZ HELP What would happen if a cell dissolved in water like sugar does
    13·1 answer
  • The fossil evidence found in these sedimentary layers BEST implies that A) invertebrates evolved into vertebrates. B) animals ev
    14·2 answers
  • _____ can produce their own food. Autotrophs Heterotrophs Bacteria Protists
    8·2 answers
  • Name the process of conversion of wood into coal​
    5·1 answer
  • Why is crossing-over important?
    7·2 answers
  • Hikers who found a human body at high altitude in the italian alps thought the man had died recently but tests indicated he was
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!