People with two copies of the sickle cell gene have the disease. People who carry only one copy of the sickle cell gene do not have the disease, but may pass the gene on to their children. Abnormal hemoglobin, called hemoglobin S, causes sickle cell disease (SCD). The problem in hemoglobin S is caused by a small defect in the gene that directs the production of the beta globin part of hemoglobin. This small defect in the beta globin gene causes a problem in the beta globin part of hemoglobin, changing the way that hemoglobin works.
Answer:
1:2:1
Explanation:
If we cross heterozygous for all three trait with a plant that is homozygous with the greenpods. so:
See attachment:
Conclusion:
The Heterozygous for all three traits will be : 50%
heterozygous for short seed shape: 50%
The correct answer is: silent mutation
There are a few types of genetic mutation that can change genetic code. Those mutations can be classified:
1. Substitution-only one base is changed
• Nonsense mutations-when substitution leads to the formation of a stop codon instead of a codon
• Missense mutations-when one nucleotide is substituted and a different codon is formed
• Silent mutations-when a nucleotide is substituted and the same amino acid is produced
2. Insertion- extra base pairs are inserted
3. Deletion- section of DNA is deleted
Answer:
The interphase: <em>DNA duplication</em>; The prophase: <em>Nucleus disappear</em>; The metaphase: <em>Chromosome line up at the middle of cell</em>; The anaphase: <em>Chromatids separation</em>; The telophase: <em>New cell membrane formed</em>; The cytokinesis: <em>Divided into two cell</em>.
Explanation:
A cell cycle includes 4 main phases: G0 phase, Interphase, Mitotic or Meiosis phase, Cytokinesis.
- G0: cell has left the cycle and stop dividing
- Interphase: including G1, S, G2: cell increases its size, and the DNA is duplicated to prepare for cell division.
- Mitotic or Meiosis phase: including prophase, metaphase, anaphase, telophase. In this stage, the nucleus and materials are divided.
- Cytokinesis: Cell divides into two daughter cells.
The answer is B
Synthetic, oil
