Jenny has red hair and freckles. We know that non-red hair (R) is dominant to red hair (r), and that freckles (F) are dominant to plain skin (f). She tells you that her mom has brown hair and freckles, and that her dad has red hair and plain skin. Furthermore, she says that her maternal grandmother (her mom’s mom) had red hair and plain skin. What is Jenny’s genotype?

Hello Milan!

Answer:

rrFf

Explanation:

In this question, we’re talking about two traits, which means that we will represent their genotypes with four letters ( two letters for each trait, since one trait is present in two chromosomes -pair-, one from the mother, and one from the father, revise if you don't get it, or just ask me).

First, let’s make everything clear:

Capital letters are for dominant traits (if one dominant trait is present in the genotype, it will be shown as the phenotype of a person)

Small letters are for recessive traits (if both chromosomes have the recessive trait, it will be shown as the phenotype)

( one letter = one allele )

R : not-red hair         r : red hair

F : freckles                f : plain skin

Second, let's write down every possible genotype for each person:

Let's start with Jenny, she has a recessive trait (red hair) and a dominant trait (freckles). As I mentioned before, we will represent recessive traits in two small letters ( rr for Jenny's red hair ). And in the case of our dominant trait ( freckles), we MUST have at least one capital letter (for this trait: F ). That means we have two possible genotypes for freckles: either Ff or FF.

Now as easy as it sounds, we should write Jenny's possible genotypes like this:

                                    Either rrFf or rrFF

Jenny's mother has brown hair and freckles (two dominant traits), again, as I mentioned before, dominant traits MUST be represented by at least one capital letter.

               Possible genotypes for brown hair:

             either RR or Rr

              Possible genotypes for freckles:

            either FF or Ff

Here, we have the phenotype of one parent of Jenny's mother's parents. Lucky for us, Jenny's grandmother has two recessive traits that can only be presented as rrff.

Why are we lucky? Because Jenny's mother must have inherited one allele of her grandmother, since both of Jenny's grandmother's alleles are the same, we know that Jenny's mother has one r allele and one f allele. We can write down Jenny's mother's genotype like this: RrFf.

Now I ask you to stop reading and try to figure out Jenny's father's genotype.

It is rrff, just like her grandmother.

Finally, let's make a Punnett square for Jenny's genotype:

                  mother:     father:

                    RrFf     x    rrff

( I'm not gonna show you how to make a Punnett square because that's gonna be a tooooooo long explanation, watch this video: https://youtu.be/qIGXTJLrLf8 )

         possible genotypes for Jenny and her siblings:

  RrFf  (phenotype: non-red hair & freckles)

or  Rrff  (phenotype: non-red h & plain skin)

or  rrFf  (phenotype: red h & freckles)

or  rrff  (phenotype: red h & plain face)

If Jenny has red hair and freckles, she MUST have a genotype of rrFf. If not, her mother is cheating XD (or a genetic mutation had happened).

I know I took too long explaining and answering but I hope I helped you,

keep it up!!

The correct genotype Jenny would be - rrFf .

The information we have in this question is:

Let find the genome of her maternal grandmother:

Her maternal grandmother had red hair skin which is a recessive trait and plain skin which is also a recessive trait that means she must have both recessive alleles for each trait as recessive allele express itself in the absence of dominant allele

The genotype of maternal grandmother: rrff

Let find the genome of the mother:

Mother has brown hair and freckles and brown hair is only present in heterozygous conditions if R allele is present with r allele however, Freckles can be in two conditions FF or Ff. The mother of jenny's mother has rrff then she must carry one f allele which concludes that Jenny mother has Ff.

The genotype of mother: RrFf

Let find the genome of her father:

Her father has red hair and plain skin and as we explained that both are recessive traits then the genotype of her father would be - rrff

Finally, the genotype of jenny can find out by the cross between the genotype of her parents:

   (see image for cross)

The genotype of Jenny would be rrFf as red skin is a recessive trait that is only possible with two recessive alleles and for the freckles, there are two possible conditions, Ff and FF that can find out by crossing given in the image.

Thus, the genotype of Jenny is - rrFf

Learn more about alleles:

https://brainly.com/question/14104138

1. A food chain is one part of a food web. Which list is part of the food web shown above?
A diatoms-fish-leopard-seal-orca
B diatomskrill--fish-great white
shark-orca
C copepodsdiatomskrill--fish-
leopard-seal-orca
Dorca--leopard-seal--squid-copepods- diatoms
Help pls will get brainliest

What two elements are used in carbon dioxide

Scientists can create transgenic organisms by inserting foreign DNA randomly into the chromosomes of a host. A scientist might do this in order to express genes carried in the foreign DNA and in this case the foreign DNA is often engineered to include insulator sequences at the ends of the foreign sequence. Why insulators would be useful in this context

A crop-dusting plane has to fly low and slow. It needs wings with a surface area ____________________the surface area of a jet wing.
a.
less than
c.
greater than
b.
equal to


Please select the best answer from the choices provided

A
B
C

why is it painful when a bee stings you.​

What negative effect occurs when there is a decrease in air quality?

Although Domain Bacteria is very diverse, bacteria do share some basic characteristics. Which of the following are some of those shared characteristics?
Question 4 options:
Bacteria are surrounded by a a strong cell wall made of a molecule called peptidoglycan.

Bacteria are eukaryotes.

Bacteria are prokaryotes.

Their DNA is one single, circular chromosome

The ligand binding domain of a protein must be inserted in

name four types of pathogens that could cause infectious diseases?

which of the following is NOT a basic need of plants in order to live
a.water
b.oxygen
c.sunlight
d.carbon dioxide

just say a b c or d is the answer ill give brainlist and ten points

what is the main point of the villi

Pls help asap


Problem
A car sells for \$5000$5000dollar sign, 5000 and loses \dfrac{1}{10}
10
1
​
start fraction, 1, divided by, 10, end fraction of its value each year.
Write a function that gives the car's value, V(t)V(t)V, left parenthesis, t, right parenthesis, ttt years after it is sold.

Molly wanted to test out new NikeSpeed running shoes that claim to make her run faster than her regular Nike shoes. If she wanted to test these shoes, what would be her:
Independent variable:

Dependent Variable:

TWO controlled variables:

Control Group:

Experimental Group

The diagram represents a taxonomic tree showing the possible evolution of six species of finches.



The most likely explanation for the branching pattern seen in the circled region labeled X is that:
A.
environmental changes resulted in extinction
B.
speciation occurred as a result of inbreeding
C.
no speciation occurred during this time
D.
environmental changes influenced speciation

Which of the following best describes why the two organisms you chose are closely related to each other using evidence from the chart?

Which population is most likely to survive in the event of a new disease?
A.
a very diverse population
B.
a somewhat diverse population
C.
a population with little diversity
D.
a population with no variation

Which is NOT part of the excretory system

A.Bladder
B.Kidneys
C.Urethra
D.Large intestine

31
Directions: Select the correct planet
The diagram below shows the orbits of the inner planets around the Sun. Based on the diagram, which inner planet has the longest
year?
Nenus
Mars
Mercury
Earth

please answer this question:)​

NO LINKS Roundworms use the_____ route to move between two dogs.

2. What is a characteristic of animals that use chemicals for defense?
A. They rely on Mullerian mimicry for defense.
B. They rarely use camouflage as a defense.
C. They usually use their speed for defense.
D. They rely on Batesian mimicry for defense.

In order to perceive forms and patterns from incoming stimuli, individuals utilize____.


A. feature analysis

QUESTION 9

Neurotransmitters are stored in
A. the synaptic cleft.
B. synaptic vesicles.
C. the postsynaptic neuron.
D. Nissl bodies.
E. smooth endoplasmic reticulum.

Viroids’ largest impact is on ________.

Which situation is an example of altruistic behavior?(1 point)

A) A child steals an apple.

B) A child shares an apple.

C) A child eats an apple.

D) A child throws away an apple.

How do water's relative densities as a solid and a liquid differ from that of most other substances?

Storz (2007) describes an adaptive response to low partial pressure of oxygen in an environment at high elevation. Describe three other environmental conditions besides high elevation that might result in adaptation to hypoxia. List an organism found in each of the described environmental conditions that would be predicted to exhibit adaptive responses to low partial pressure of oxygen.

PLEASE HELPPP question and choices in the picture below

The following case study is a paraphrase from "Good Clinical Practice. Standard Operating Procedures for Clinical Researchers" (Kolman, J., Meng, P. and Scott, G. editors; John Wiley and Sons publishers, 1998):

“While a study subject and a relative were walking in town one day during the summer, a hanging flower basket fell on a study subjects head, resulting in the study subject falling down and becoming unconscious. The subject’s relative called for an ambulance. On arrival at a local hospital’s Emergency Department, in which the subject regained consciousness but could not recall the event, a x-ray revealed a fractured skull. The subject’s consciousness level at this point was deteriorating and after further tests a subdural hematoma was diagnosed, which was evacuated under general anesthesia. Postoperative recovery was uneventful and progressing well until day four, when the patient developed acute dyspnea (shortness of breath) at rest during visiting time. An emergency lung scan was performed that confirmed a diagnosis of pulmonary embolism. The study subject was anticoagulated and was eventually discharged from the hospital”

1. What is/are the AE/s in the case study?

2. Are there any AEs that are "serious"? If "yes", list them and state why they are serious.

3. What are your thoughts about the AE(s) being related to the study drug (NOTE: we do not know whether the subject is on active drug or placebo)?

When water evaporates,
the particles
A stop moving
B. move faster
C. move slower.
D. explode.