answer.
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
LUCKY_DIMON [66]
2 years ago
4

A human fertilized egg contains one chromosome with HbS, the allele for sickle cell disease, and a homologous chromosome with Hb

s, the wildtype allele. It also contains an X and Y chromosome. At what point will meiosis occur to create cells that are either HbS or Hbs
Biology
1 answer:
lara [203]2 years ago
7 0

Answer:

After attainment of puberty during the process of spermatogenesis.

Explanation:

Given that the fertilized egg has one X and one Y chromosome as the sex chromosomes, the zygote will develop into the human male.

After the attainment of puberty, the process of sperm formation, the spermatogenesis, would occur in the testes of the male.

Spermatogenesis includes meiosis in sperm mother cells to produce haploid sperms. During anaphase-I of meiosis I, the separation of homologous chromosomes to the opposite poles would separate the wild type allele Hbs from the allele for sickle cell disease, HbS.

The sperms produced by the end of meiosis II would have either HbS or Hbs allele.

You might be interested in
Select the correct location on the image. The diagram shows an unfertilized female sex cell at different locations within the re
Marianna [84]

Answer:The image to this question is attached.

Answer is the ovary

Explanation: the process by which egg is produced is called oogenesis. It involves the mitotic division of the primodial germ cells to from a oogonia. The oogonia becomes enveloped by follicle cells . Oogonia grows to become the primary oocyte. Each primary oocyte is diploid. It then undergoes the first meiotic division to form the secondary oogonia and a smaller polar nody. all this process of development occurs in the ovary.

After it is released from the ovary, fertilization occurs and it undergoes the second meiotic division to from a polar body and an ovum.

The primary oocyte however remains in prophase of meiosis l throughout childhood.

8 0
2 years ago
Which best describes the role of auxin?
finlep [7]

Answer:

Auxin is a hormone of a plant. It is produced in the stem.

Explanation:

This is what causes phototropism. This also helps the plant maintain apical dominance.

8 0
2 years ago
Read 2 more answers
In E. coli, the primary component of the mismatch repair system is the protein MutS. How does MutS recognize mismatched base pai
nignag [31]

Answer:

The best answer to the question, given the research found on this particular process in E. Coli specifically, would be: D) It identifies hemimethylated base pairs and methylates the unmodified base.

Explanation:

According to research on this pretty complicated topic, in E. Coli specifically, and other gram negative prokaryotes, it has been found that the presence, or absence of methylation will initiate MutS, which is a protein both in prokaryotes and eukaryotes responsible, in a full complex, of initiating and carrying out the full mechanism of DNA mismatch repair. As the daughter DNA strands are produced from parent strands, these first ones arise with several deletions and mismatches which need to be repaired and they are recognized due to the fact that daughter strands are hemimethylated. This circumstance activates MutS in E. Coli, who will then bind to the DNA strand that needs to be repaired and together with other members of the complex, like MutH and MutL, begin the process of repair.

In eukaryotes and other prokaryotes, the exact process by which DNA is repaired by MutS is still not totally known.

6 0
2 years ago
The autonomic nervous system (ANS) plays a crucial role in the stress responses by regulating chiefly the ________ and ________
vaieri [72.5K]

Answer: lymphatic circulatory; respiratory

Explanation:

The autonomic nervous system controls the internal body functions and responses which are not under the voluntary control. The functions control by the autonomous nervous system are heart rate, body fluid circulation, respiration, urination, sexual arousal and pupillary response.

The lymphatic system is one of the part of the circulatory system, it consists of a network of connected tubes called as lymphatic vessels. These vessels distribute the lymph fluid throughout the body. The lymph fluid consists of white blood cells which provide immunity against the pathogen.

The respiratory system is the system which controls the exchange of gases (Carbon dioxide and oxygen) between the body and the environment.

Both lymphatic circulation and respiration are the two functions controlled by the autonomic nervous system.

6 0
2 years ago
Photosynthesis can be modeled by its overall chemical reaction. Which two compounds are the inputs or reactants of this reaction
professor190 [17]
Reactants of photosynthesis include light energy, H2O, and CO2. So I would imagine it’s H2O and CO2
8 0
2 years ago
Read 2 more answers
Other questions:
  • Sleep may decrease activity of neurons associated with ________, suggesting an important cognitive benefit of sleep
    13·1 answer
  • The processes of encoding, storage, and retrieval are seen as part of the ____________ model of memory
    13·1 answer
  • The rough endoplasmic reticulum is a cell structure that consists of folded membranes that contain ribosomes. What is the advant
    8·1 answer
  • Let’s suppose a sheep that provided the oocyte for reproductive cloning was homozygous for a gene that causes a small head. This
    15·1 answer
  • How could the duplication of the Hox gene complex help facilitate animal adaptive radiation?
    7·1 answer
  • A hypothesis is a general principle or explanation that is derived from observations. Suppose you make the following observation
    11·1 answer
  • Students at a university were split into two groups and each received a different text for a philosophy course. One group receiv
    7·1 answer
  • Write a few sentences explaining whether the following theme from The Outsiders is universal: “People often struggle to fit in;
    7·2 answers
  • Four Students were having a discussion about how scientists do their work. This is what they said... Antoine: "I think scientist
    9·1 answer
  • Which factors are used to characterize a biome, such as the desert, tropical rain forest, or temperate grasslands? Select all of
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!