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
ikadub [295]
3 years ago
13

Imagine a pedigree that traces an inherited disorder found in individuals with two recessive alleles for gene D. The pedigree sh

ows three siblings with the genotypes DD, Dd, and dd. Did the parents of these three children have the disorder? Explain.
Biology
1 answer:
d1i1m1o1n [39]3 years ago
5 0
No, the parents don't have a disorder, but they carry recessive allele.

Individuals with the disorder are recessive homozygous (dd). It is known that recessive allele produces its phenotype only when it is paired with another recessive allele. Thus, to have offspring with disorder (with genotype dd), parents must be heterozygous, or one parent is recessive homozygous, and the other one is heterozygous. 

Now, let's imagine both situations:

Parents:            Dd           x              dd
Offspring:       Dd       Dd         dd           dd

In this cross, there is no possibility to have children with genotype DD.

Parents:            Dd           x              Dd
<span>Offspring:       DD       Dd         Dd           dd
</span>
In this cross all three genotypes DD, Dd, or dd could be inherited.

It can be concluded that three children with <span>the genotypes DD, Dd, and dd, the parents must be heterozygous which do not have the disorder.</span>
You might be interested in
Describe the types of effects a DNA mutation<br> could have on the protein.
Nina [5.8K]

Answer:

Point mutations can cause serious changes to an organism if they change the way a protein works. A mutation in DNA alters the mRNA, which in turn can alter the amino acid chain. ... And a base substitution can also cause a silent mutation, in which the protein's function doesn't change at all.

6 0
3 years ago
Read 2 more answers
What is represented by<br> region on the sound<br> wave
elena-s [515]

Answer:

Compressions and Rarefactions

<em>A vibrating tuning fork is capable of creating such a longitudinal wave. As the tines of the fork vibrate back and forth, they push on neighboring air particles. The forward motion of a tine pushes air molecules horizontally to the right and the backward retraction of the tine creates a low-pressure area allowing the air particles to move back to the left.</em>

Explanation:

These regions are known as compressions and rarefactions respectively. The compressions are regions of high air presure while the rarefactions are regions of low air pressure.

<em>Sound waves can also be shown in a standard x vs y graph, as shown here. This allows us to visualise and work with waves from a mathematical point of view. The resulting curves are known as the "waveform" (i.e. the form of the wave.) The wave shown here represents a constant tone at a set frequency.</em>

8 0
3 years ago
Which types of molecules make up the majority of a cell's plasma membrane?
Dmitriy789 [7]
The answer is B: proteins and lipids.
Also carbohydrates
5 0
3 years ago
Lysosomes can be compared to the recycling and garbage centers of a city. How can this comparison be justified?
Ivan
I think the correct answer from the choices listed above is the second option. Lysosomes can be compared to the recycling and garbage centers of a city. This can be justified since they <span>digest excess or worn out organelles, food particles, and engulfed viruses or bacteria.</span>
6 0
3 years ago
In frogs, different mating seasons are a (n) to reproduction
Leokris [45]

In frogs, different mating seasons are a barrier to reproduction.

7 0
2 years ago
Other questions:
  • A plant nursery only grew one type of tomato plant. All of their tomato plants died from the same disease. What was most likely
    14·1 answer
  • What types of materials are expelled from cells during exocytosis?
    9·1 answer
  • How are the roles of pecan trees and fox squirrels related within an ecosystem?
    8·1 answer
  • What do centromeres attach to during metaphase
    6·1 answer
  • Explain how predation, disease, and competition impact a population-based upon scale and distribution of the organisms.
    11·1 answer
  • The variety of organisms within an ecosystem is characteristic of which type of diversity?
    14·1 answer
  • What contains starch
    8·2 answers
  • The only interphase in meiosis takes place before *
    13·1 answer
  • What is two kingdom classification system.?​
    10·2 answers
  • Which of the following is NOT one of the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!