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Oct 21, 2023 · Meiosis Definition, Diagram, Steps, and Function. Meiosis produces haploid gametes from a diploid cell. DNA replicates once, but the cells divide twice. In biology, meiosis is the process where a cell replicates DNA once but divides twice, producing four cells that have half the genetic information of the original cell.
- Worked Example with Probabilities and Ratios
- Drawing Punnett Squares
- Codominance and Blood Groups
The best way to explain genetic inheritance is through a worked example of a monohybrid inheritance – the single characteristic of hair colour. Let us pretend that the father has dark hair and the mother has blonde hair. Therefore, the alleles for the father could be DD (homozygous dominant) or Dd (Heterozygous) and the alleles for the mother must ...
You can use Punnett Squares with any combination of alleles as long as they are single gene crosses. How do you draw one of these? First, find the allele of the parents. The place the alleles of one parent at the top of the punnet square and one set of alleles on the side. Then write one allele from each parent per box. Do this for four boxes. This...
There are 4 good groups.They are A, B, AB and O.There are 3 different alleles for blood groups.They are IA, IB and IO.There are codominant alleles.IA and IB are codominant with each other so you you have both alleles, both are expressed to give the blood group AB.I° is recessive.When you get two of these alleles, your blood group is O. If you get one of these alleles and say the other is IB, only IB will be expressed giving you the blood group B.The diagram shows the relationship between the cell, its nucleus, chromosomes in the nucleus, and genes. Chromosomes are found in the nucleus of a body cell in pairs. One chromosome is...
Figure 11.8 Meiosis and mitosis are both preceded by one cycle of DNA replication; however, meiosis includes two nuclear divisions. The four daughter cells resulting from meiosis are haploid and genetically distinct.
Dec 20, 2023 · A genetics diagram is a visual representation of the inheritance patterns of specific traits or disorders. It helps to illustrate how genes are passed down from parents to offspring and how different combinations of genes can result in variations in traits.
Dec 8, 2016 · In the diagram below, the red chromosomes are the ones inherited from the mother, the blue from the father. At the start of the following diagram, the DNA has already been replicated, which is why the red and blue chromosomes look like the letter “X”. Each one of these “X” chromosomes consists of two sister chromatids – cloned DNA from replication.
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13.1: Sex Linkage and the Chromosomal Theory of Inheritance; 13.2: Sex Chromosomes and Sex Determination. 13.2.1: Sex Chromosomes; 13.2.2: Inferring the Mode of Inheritance; 13.3: Exceptions to Chromosomal Theory of Inheritance. 13.3.1: Organellar Inheritance; 13.4: Genetic Mapping. 13.4.1: Classification and Detection of Molecular Markers
