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
OLga [1]
3 years ago
11

CREATING PUNNETT SQUARES FOR THE FISHER FAMILY There are six people in the Fisher family. Olivia and Marcus are the parents. The

y have four children: Violet, Nathan, Jonas, and Claudia. Neither Olivia nor Marcus have freckles. What is Olivia's genotype? What is Marcus' genotype? What is the probability that each child has of inheriting freckles? Both Marcus and Olivia are heterozygous for the hairline trait. What is the probability that each of their children could inherit a widow's peak? What is the probability that each of their children could inherit a straight hairline? What is the probability that each of their children could be homozygous dominant for the trait? Neither Marcus nor Olivia can roll their tongues. How many of their children could be born with the ability to roll their tongues? How many of their children could be heterozygous? What is the genotype of the whole family? All four children have dimples. What is likely the genotypes of their parents? Do we know with certainty that one of the parents has to have dimples? Both Olivia and Marcus are EE for the earlobe trait. Among their children, what is the ratio of free earlobes to attached earlobes? What percentage of the children are homozygous? Marcus can not detect the bitter taste. Olivia has been found to be able to detect the bitter taste, but she is heterozygous for the trait. What is the probability that each of their children could taste the ptc paper? If Violet can not taste the ptc paper, what is Violet's genotype? Given what you know, how many of the family can taste the ptc paper?    please answer it correctly       there or 16 questions
Biology
1 answer:
trasher [3.6K]3 years ago
6 0
Really, there are multiple questions all rolled into one.I will try to answer them patiently and systematically.
First summarize data.
A. Neither Olivia nor Marcus have freckles (recessive, ff)
B. Both are heterozygous for the hairline trait (dominant Ww)
C. Neither Marcus nor Olivia can roll their tongues (rr).
D. All four children have dimples (dominant Dx)
E. Both Olivia and Marcus are EE (unattached earlobe trait).
F. Marcus can not detect the bitter taste (pp for PTC gene)Olivia has been found to be able to detect the bitter taste, but she is heterozygous for the trait. (Pp for PTC gene)

A. Freckles, F (Dominant)
"Neither Olivia nor Marcus have freckles" =>
both have genotype ff.
None of the children have freckles (i.e. P(F)=0% for freckles in all children)

B. Widow's Peak, W (dominant)
"Both are heterozygous for the hairline trait"
So both have genotype Ww.
Punnett square
       W    w 
W WW Ww
w Ww   ww
Since W is a dominant trait, only ww (25%) will have straight hairline, 75% will inherit the widow's peak. 
50% of the children will be homozygous (Ww).

C. Rolling tongues, R  (dominant)
"Neither Marcus nor Olivia can roll their tongues" 
means that both are homozygous recessive, with genotype rr.As in freckles, all children will have genotype rr, so none of them will roll their tongues. 
None will be heterozygous.  The whole family's genotype is rr.


D. Dimples, D (dominant)
"D. All four children have dimples"
implies that all children have genotype DD or Dd.
It is likely that at least one parent has genotype DD in order to have 100% of children have DD or Dd.Here are some possibilities

Case 1: DD + DD (both homoozygous dominant)
     D   D   
D DD DD
D DD DD
Phenotype: 100% have dimples

Case 2: DD + Dd (one homoozygous dominant, and other heterozygous) 
     D  d
D DD Dd
D DD Dd
Phenotype: 100% have dimples

Case 3: DD + dd (one homoozygous dominant, and other homozygous recessive) 
    D    D
D DD DD
d Dd Dd
Phenotype: 100% have dimples

Case 4: Dd + Dd (both heterozygous) 
      D  d
D DD Dd
d Dd dd
Phenotype: 75% have dimples, 25 do not.Note: all 4 children could have dimples, with probability 31.6%

Case 5: Dd + dd (Heterozygous + homozygous recessive)
     D  d
d Dd dd
d Dd dd
Phenotype: 50% have dimples, 50 do not.Note: All four children could have dimples, with probability 6.25%.

Case 6: dd + dd (Both homozygous recessive)
   D   d
d dd dd
d dd dd
Phenotype: all children have no dimples.
Conclusion:Likely genotypes of parents: DD+DD, DD+Dd, DD+dd
Possible genotypes of parents: Dd+Dd, Dd+dd
Impossible genotype of parents: dd+dd
Therefore we know with certainty that at least one of the parents has dimples.

E. Unattached Earlobe trait, E (dominant)
"Both Olivia and Marcus are EE"
(i.e. unattached earlobe trait).
This means that the whole family will have genotype EE, i.e. all are homozygous dominant, and have unattached earlobes.

F. Bitter taste, P  (incomplete dominance)
"Marcus can not detect the bitter taste (pp for PTC gene)
Olivia has been found to be able to detect the bitter taste, but she is heterozygous for the trait. (Pp)"
     P   p
p Pp pp
p Pp pp
Probability for each single child being able to taste the ptc paper is 1/2.
Probability for all children being able to taste the ptc paper is (1/2)^4=1/16.
If Violet cannot taste the ptc paper, her genotype is pp.
We do not know for sure how many of the children can taste the ptc paper. 
The most like situation is only half of them can taste, so do the parents.  Therefore, half of the family can taste the ptc paper.


Finally, as to "please answer it correctly", I believe I did.  :)


You might be interested in
What 2 things are produced by neutralization
LUCKY_DIMON [66]

neutralisation is the process of converting an acid or a base into the pH value 7.The 2 things produced r hydrogen gas and a salt.

acid+base=salt+hydrogen gas.This often occured in your stomach. when you have gastroble you are eating tablets which are base and a reation take place with hydrocloric acid in it

hope it helps


6 0
2 years ago
Consider a series of metabolic events during fasting. Within a few days after a fast begins, nitrogen excretion accelerates to a
timurjin [86]

Answer:

A series of events occur, in prolonged fasting; the body undergoes changes and adaptations of its metabolism to continue to meet energy needs and maintain vital functions, despite not receiving food

These changes are divided into three phases according to the elapsed days of fasting and according to the metabolic processes involved.

First phase: main consumption of reserve carbohydrates.

Second phase: main consumption of fats.

Third phase: serious consumption of proteins.

Explanation:

If the fast is prolonged in time, the metabolic processes change in their qualitative and quantitative characteristics, so that the energy products consumed (glucose, free fatty acids and ketone bodies) are modified, their oxidation decreases globally and after the initial depletion of hepatic and muscular glycogen and protein catabolism, the main source of glucose is the liver through gluconeogenesis. The substrates initially come from protein catabolism and lipolysis, but later protein destruction slows down, maximizing lipolysis.

Between the first phase and the second phase of the fast some muscle proteins are lost but not excessively, even with fasts of two or three weeks.

After about 2 weeks of fasting, up to two-thirds of the energy the brain needs is obtained from ketone bodies. These ketone bodies are the breakdown products of fats and are responsible for the typical ketone breath reminiscent of the smell of acid apples; urine also smells like ketone.

In this phase, damage begins to occur in some important organs such as the liver and kidneys. Starting the first week of fasting, acidosis affects the heart's function of the circulation and the brain.

In the third phase of the prolonged fast it happens from 3 weeks, that is, about twenty days without food, although it varies according to the constitution of each person. A peak of muscle protein consumption occurs and a great loss of weight begins to be perceived with great weakness. Edema occurs and albumin concentration in the blood is altered, as a sign of the self-digestion of muscle proteins.

From approximately 30 days of fasting, the state of malnutrition severely affects all body systems. After forty or fifty days the deterioration is noticeable due to physical wear, the person loses his mobility and suffers from unconsciousness. Finally, starvation death can occur from cardiorespiratory arrest or from lack of blood supply to the brain.

7 0
3 years ago
Read 2 more answers
Which elements are the most abundant in living organisms?
vitfil [10]

Answer:

oxygen , carbon , hydrogen , nitrogen , phosphorus , sulfur are some examples

4 0
2 years ago
Organiza los siguientes conceptos en orden cronológico: 1) Fotosíntesis 2) Respiración aeróbica 3) Primeros organismos eucariont
Crank
<h2>respiracion aerobic</h2><h2>fotosintesis</h2>

organismo Eucaronte

<h2>pluricelular</h2><h2>reproduciion  </h2><h2 /><h2 />

8 0
2 years ago
Some microorganisms can live in the intestines of termites. The termites eat wood, which the microorganisms break down into nutr
marishachu [46]

Answer:

it is a commensalism symbiosis

where the termites benefits from the wood and the microorganism benefits also and also unaffected

3 0
2 years ago
Other questions:
  • HCG is secreted in the human female immediately after conception. How would a gynecologist use this information?to detect pregna
    15·2 answers
  • Compare and contrast the advantages and disadvantages of sexual and asexual reproduction
    9·1 answer
  • Help with McGraw hill properties of matter vocab part 1
    11·2 answers
  • Select all the correct answers.
    13·1 answer
  • Your body makes protein for hair and nails and cell membranes etc. through the process of protein synthesis which includes trans
    15·1 answer
  • A researcher is using the pUC18 vector to introduce a human gene into bacteria. He exposes bacteria to this recombinant molecule
    14·1 answer
  • 2. What does it mean for your body to be out of homeostasis?
    10·1 answer
  • Bacterial strain A (met , his-, arg ) is mixed with bacterial strain B (met-, his , arg-), grown in complete media, then plated
    9·1 answer
  • What is so special about Earths climate change over the last 5 years???
    7·1 answer
  • Answer pls!!<br><br><br><br> bio<br><br><br> --------------------
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!