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
Rasek [7]
3 years ago
11

This pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. Based on the information in the chart, w

hich of the following statements is true about individuals 3 and 4?
At least one is heterozygous for the trait.
They are both homozygous dominant for the trait.
They are both heterozygous for the trait.
At least one is homozygous for the trait.

Biology
2 answers:
kicyunya [14]3 years ago
8 0

They are both heterozygous for the trait.

They both express the dominant trait, but one of the offspring is recessive. The only option for this is that both are heterozygous and have two genes: recessive and dominant.

You can see this when you draw a Punnett square.

Subject 3 will be Dd where D is the dominant trait, and d is the recessive trait. Subject 4 will be Dd.

Now cross them, and you'll found 25% chances of having a recessive offspring.

You can't have only one of them heterozygous because, when you draw the Punnett square, you'll have 50% dominant and 50% dominant heterozygous.

The same happened with only one homozygous.

And, if they were both homozygous dominant you only have one trail, no two, and again you can't have a recessive offspring.

Slav-nsk [51]3 years ago
5 0
B is the answer to the question.
You might be interested in
How are land, air, water and living things impacted by too much carbon dioxide?
choli [55]

Answer:

- In terrestrial environments: increasing CO2 levels cause an increased photosynthetic rate

- In aquatic environments: increasing CO2 levels cause an increase in water acidity  

- In both terrestrial and aquatic environments: increasing CO2 levels lead to an overall increase in the average temperature (global warming)

Explanation:

In terrestrial ecosystems, rising carbon dioxide (CO2) levels increase the rate of photosynthesis (since CO2 is one of the reactants in photosynthesis), thereby also increasing plant growth. Moreover, in aquatic ecosystems, rising CO2 concentrations increase the levels of this gas dissolved on the surface of the oceans. This increases the acidity of the oceans, thereby modifying habitats and food web structures. The increasing acidity of the oceans also reduces the amounts of carbonate, which difficult for aquatic species (e.g., corals) to form their shells/skeletons. Finally, CO2 is a greenhouse gas that contributes to the increase in the average temperature by absorbing solar radiation that would otherwise have been reflected by the Earth's surface, and this increase in the temperature negatively affects life in both terrestrial and aquatic environments.

5 0
2 years ago
Jonathon tests four people that were present during a shooting incidence. He notes that there is gunshot residue on all but two
Ket [755]
The answer is choice D.
7 0
3 years ago
What is the meaning of monsoon​
prohojiy [21]

Explanation:

a seasonal prevailing wind in the region of South and Southeast Asia, blowing from the southwest between May and September and bringing rain (the wet monsoon ), or from the northeast between October and April (the dry monsoon ).

the rainy season accompanying the wet monsoon.

7 0
2 years ago
Need Help!!!!!!!!!!
GarryVolchara [31]
It would be 2 times.
6 0
3 years ago
Read 2 more answers
Explain how fibrin protects the body​
makvit [3.9K]
Fibrin is involved in shrinking clots which is also apart of "hemostasis" and wound healing. It has the ability to protect tumors from cells immune to cancers.
7 0
3 years ago
Other questions:
  • Chronic toxicity to an agent kills you immediately. <br> a. True <br> b. False
    14·1 answer
  • DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal in
    10·2 answers
  • Describe one of the many paths a carbon molecule can take through the carbon cycle.
    15·1 answer
  • What general surgical techniques are necessary for a live donor kidney transplant?
    6·2 answers
  • What type of vegetation is not frequently found in the tundra?
    7·2 answers
  • The group in an experiment that is not exposed to the tested variable called the____group
    15·1 answer
  • which of the following does not change when a car keeps a constant speed but changes direction? A.acceleration B.velocity C.mome
    7·2 answers
  • In garden peas, tall plants (T) are dominant to short plants (t), and round pods (R) are dominant to constricted pods (r). A tru
    12·1 answer
  • Why can’t your body heal an amputation, such as the loss of a finger, the same way it can heal a cut?
    10·1 answer
  • Janis tore a ligament in her ankle. Until the injury heals, she is at most risk for which of the following? dislocating bones lo
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!