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
Montano1993 [528]
3 years ago
15

Two brothers have X‑linked red–green colorblind vision, and their parents have normal color vision. The first brother's karyotyp

e is 47,XXY (Klinefelter syndrome), and the second brother's karyotype is 46,XY. In which parent and in what cell division phase did the first brother's chromosomal nondisjunction occur? Assume no recombination.
Biology
1 answer:
zhenek [66]3 years ago
3 0

Answer:

The answer is mother in meiosis II

Explanation:

nondisjunction can be defined as the failure of the segregation of the child chromosomes in meiosis I and meiosis II resulting in gametogenes. This results in abnormal gametes with some chromosomal imbalance being formed and subsequent fertilization of these gametes results in a generation of abnormal individuals.

According to exercise, red-green color blindness follows an X-linked recessive pattern and the phenotype is only expressed. the father cannot bring the possibility of color blindness to his children, and the nondisjunction, defined earlier, cannot occur in either meiosis I or meiosis II. As a conclusion we can say that it may have a place in meiosis I or meiosis II corresponding to the mother and although the mother's condition may be normal, the first child would be compromised with color blindness, therefore, the mother is the carrier.

You might be interested in
A child with a body mass index (bmi) equal to or greater than the 85th percentile, but less than the 95th percentile, is:
Vilka [71]
About the 90th percentile
5 0
3 years ago
Describe the function of each organelle.
Elis [28]

Answer:

Cytoplasm: Fluid between the cell membrane and the nucleus. helps protect organelles

Nucleus: A part of the cell containing hereditary information and is responsible for growth and reproduction; the "command center" of the cell.

Ribosome: A small particle in the cell that can make proteins.

Endoplasmic Reticulum: A cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another.

Golgi Apparatus: A cell structure that helps make and package materials to be transported out of the cell or for storage inside the cell.

Lysosome: Cell organelle filled with enzymes needed to break down certain materials in the cell, such as large food particles or old parts of the cell. May be found only in animal cells.

Vacuole: Saclike storage structure in the cell. can store water, nutrients, and even toxic substances.

Mitochondrion: An organelle containing enzymes responsible for producing energy. (Metabolism/respiration)

Chloroplast: An organelle found in the cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy (photosynthesis).

Cell membrane: The thin, flexible barrier around a cell; controls what enters and leaves the cell.

Cell wall: The structure outside of the cell membrane that is used to provide support and protection. Present in plants, algae, fungi, and many prokaryotes.

8 0
3 years ago
Oxygen is what please help I have a timer of 6 minutes please
Vera_Pavlovna [14]

Answer:

A product of photosynthesis and cellular respiration

Explanation:

4 0
2 years ago
Read 2 more answers
What name is given to organisms that look alike, share a large number
larisa [96]
It's the definition of a SPECIES.
Those animals are from the same species.
3 0
3 years ago
How do fish increase lake carbon dioxide levels?
fiasKO [112]

Answer:

they dreath in water?

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What transports oxygen<br> depleted blood to the<br> lungs to exchange CO2<br> for O2?
    11·1 answer
  • What event causes all female mammals to have one active x chromosome per cell instead of two?
    6·1 answer
  • He organization of a cell could be compared to a small city. All of the organelles inside of the cell have a specific purpose th
    15·1 answer
  • How do glycoproteins help the mucus to trap substances​
    5·1 answer
  • What 2 roles do pigments play in photosynthesis?
    5·2 answers
  • 14. Gout is the crystallization of what acid?<br> Amino<br> Uric<br> Sulfuric<br> Acetic
    6·1 answer
  • 4. Where do spore cases reside on ferns?
    14·2 answers
  • HELP PLEASE THIS IS DUE TODAY.<br> BIOLOGY
    9·1 answer
  • What type of cell is shown below?<br> Plant cell,egg cell,eukaryotic cell,prokaryotic cells?
    14·2 answers
  • specific macrophage populations promote both cardiac scar deposition and subsequent resolution in adult zebrafish
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!