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
olya-2409 [2.1K]
3 years ago
12

A husband and wife both have cleft chins, and when you look at their four children, three also have cleft chins; however, one do

es not. What can you deduce from this observation, if you already know the cleft phenotype is due to two alleles of the same gene?
(A) A cleft chin is an example of a recessive trait.
(B) A cleft chin is due to a dominant allele.
(C) This pattern of inheritance in the children must result from both parents being homozygous for the same allele.
*D) All four children are heterozygous for the two different cleft chin alleles
Biology
1 answer:
Reptile [31]3 years ago
6 0

Answer:

B- A cleft chin is due to a dominant allele

Explanation:

A husband and wife both having the phenotype for cleft chin and producing an offspring without a cleft chin, indicates heterozygousity in their genotype.

With the heterozygous genotype however, they both expressed the phenotype for cleft chin, indicating that the allele for cleft chin is dominant over the allele coding for normal chin.

Since both parents are heterozygous for cleft lip, the  sequence of genotype in their offspring will be:

  • 25% chance of having homozygous cleft chin
  • 50% chance of having heterozygous cleft chin
  • 25% chance of having homozygous normal chin

Because of the dominance of the cleft chin allele, both homozygous and heterozygous forms of the cleft chin allele, will be expressed in the offspring and only the offspring homozygous for normal chin will not express this allele.

You might be interested in
You accidentally slept in and had to jog across campus to arrive at class on time. As you walk to your seat, you notice that you
Alex

Answer:

aerobic

Explanation:

5 0
3 years ago
If someone told you that 9 out of 10 people used their right hand more than their left, would you think that the characteristic
jenyasd209 [6]
I believe that hand preference develops before birth. Specifically I believe that hand preference relates to the hemispheres of your brain. As I believe that studies now suggest that multiple genes contribute to the trait as if you parents are born right handed the likely hood is that you will be right handed. To conclude I think that this characteristic was inherited. Hope this helped!
3 0
3 years ago
Does spironolactone cause cancer in humans
Alika [10]
No it is rare..............

8 0
3 years ago
Hi ! I've been asked to think about a scientific innovation that I need to create and that doesn't exist yet ( it can also be so
harkovskaia [24]
Maybe you can do something like a self operating beaker that does all the measuring, pouring, and mixing for you. If that’s not interesting enough you can make it talk too, like a robot. Hope this helps!
3 0
3 years ago
Do plants need to eat?Or do they acquire energy through a method different from animals?Write down the differences on how a tree
deff fn [24]
For the first half of your question, plants do need to eat. In fact, they are autotrophs, which means they are self feeders.
6 0
3 years ago
Other questions:
  • Which best describes how scientists found the human gene that makes
    5·2 answers
  • What property of henrietta lacks' cells was most unusual when they were grown in the laboratory?
    14·1 answer
  • The ancestors of land plants likely evolved from
    5·2 answers
  • In what ways do mutations play a part in the processes involved in the evolution of species? *
    14·1 answer
  • A student wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. To test this hypothesis, the stu
    8·2 answers
  • PLEASE HELP
    13·1 answer
  • This is rivalry or competition between individuals of different species within a specific habitat.
    8·1 answer
  • Which option is an example or a physical property?
    12·2 answers
  • When a greenhouse gas has high global warming potential what does that mean
    15·1 answer
  • Why is gold so valuable? Is it found all over the world?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!