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
Akimi4 [234]
3 years ago
12

The pedigree shown above is based on a family with freckles (filled circles or squares) or lacking freckles (empty circles or sq

uares). Freckles are determined by one gene locus. Which of the following statements about freckles is most likely to be correct?

Biology
1 answer:
Fofino [41]3 years ago
8 0
The possible answers are 
A. Freckles are a sex-linked recessive allele.
B. Freckles are an autosomal recessive allele.
C. Freckles are a sex-linked dominant allele.
D. Freckles are an autosomal dominant allele.

The correct answer is D Freckles are an autosomal dominant allele.

From what we can see on the pedigree, in the first generation the father has freckles and the mother doesn't. All of their children have freckles. This excludes the possibility of sex-linked alleles because the father gives different sex chromosomes to his children ( X to his daughters and Y to his sons) and they all have freckles. Therefore, this must be an autosomal allele.
Since all of their offspring have the freckles, the trait must be dominant and the only possible genotypes of the parents are FF  and ff. The father has two dominant alleles for freckles ( FF a double dominant homozygote) and the mother has two recessive alleles (ff a double recessive homozygote). All of their children then must have the Ff genotype and have freckles because of the dominant expression of the F allele.

You might be interested in
Jacob and Monod were intellectually primed to draw the conclusions they did concerning regulation of the lac operon. In part, th
Alika [10]

Answer:

Jacob and Monod were intellectually primed to draw the conclusions they did concerning regulation of the lac operon. In part, this was due to their fascination with mechanisms of enzyme regulation. They knew that the activity of some enzymes is regulated when their reaction product binds to the enzyme, changing its shape and therefore its activity. This knowledge allowed them to easily make the intellectual leap to propose B) allosteric regulation of the repressor

Explanation:

When we talk about the mechanisms of enzyme regulation, we refer to allosteric regulation of the repressor. The Allosteric control of transcriptional regulatory proteins allows organisms to react to changes in environmental and metabolic conditions. Also, it is s a thermodynamic phenomenon. When it binds one molecule, the affinity with which a protein binds to a second molecule is altered.

7 0
3 years ago
Carlita was hired today for a job as a laboratory assistant. She will work for professor of molecular biology who wants to make
Over [174]

Answer: Option C) Determining the link between genes and the traits they influence.

Explanation:

First, the field of molecular biology seeks to understand the relationship between genes and proteins. Now, since genes are specific sequences on the DNA that codes for functional proteins, and these proteins make up the various traits physically expressed in living organisms such as skin color, blood group etc.

Then, the specific research goal of Carlita would be determining how genes control the expression of individual traits at the molecular level

4 0
3 years ago
What would be the pros and cons of using Linnean and modern classification system?
Anna71 [15]
<span><span>#1) What would be the pros and cons of using Linnean and modern classification system?

</span><span>Answer: The pros of using the Linnean classification system is that it conveys a very detailed information about the species and the closest relatives of living things. It helps scientists to understand the complex relationships. A con is that it takes a very large amount of information and time for this system to develop.

</span><span>I hope it helps, Regards.</span><span>
</span></span>
5 0
3 years ago
Which phrase describes the study of ecology?
djyliett [7]
<span>"D.how living things are interconnected with their environment</span>" is the correct answer. Ecology has to do with systems of environments as a whole, and the organisms that live there.
6 0
3 years ago
My homework states "The following are not characteristics of all living things. For each one give an example of something that i
Arte-miy333 [17]
The answer is a moves
3 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is NOT a disease caused by harmful bacteria
    5·2 answers
  • Which process is the major source of oxygen released into the atmosphere?
    8·1 answer
  • The _________ is the main artery that receives blood from the left ventricle of the heart distributes it to the body.
    15·1 answer
  • A polar bear runs at a speed of 11 m/s and has a mass of 380.2 kg. How much Kinetic energy does the bear have? *
    6·1 answer
  • PLEASE HELP ME ASAP!!!
    14·1 answer
  • How is sunlight used in photosynthesis?
    13·2 answers
  • Eukaryotic cells do NOT have a cytoplasm true or false
    8·2 answers
  • 50 POINTS AND BRAINLIEST!!!! URGENT
    9·1 answer
  • How much more efficient is organic farming than "regular" farming? 10% 75% 50% 65%
    10·2 answers
  • The North Atlantic right whale was classified as an endangered species in 2015. A major cause of death for these whales is colli
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!