594334
Descripción
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Alleles
- A pair of the same type of chromosomes will have the same genes. However, the
genes may be slightly different . Different versions of the same gene are called allels
- Homozygous
- If someone has 2 alleles that are exactly the same, they are said to be homozygous for that allele
- E.g. two brown eyes allels
- E.g. two brown eyes allels
- If someone has 2 alleles that are exactly the same, they are said to be homozygous for that allele
- Heterozygous
- If someone has 2 alleles of a gene that are different, they are said to be heterozygous
- E.g. one blue eye, one brown eye
- E.g. one blue eye, one brown eye
- If someone has 2 alleles of a gene that are different, they are said to be heterozygous
- Genotype and Phenotype
- A genotype is either a dominant allele or a recessive allele. A
phenotype is the outcome of the two genotypes
- Dominant allele- you can have one or two of a
dominant allele and you will show that characteristsic
- Recessive Allele- you must have two of the
same recessive alleles to show that characteristic
- Dominant + Dominant = Dominant
Dominant + Recessive = Dominant
Recessive + Recessive = Recessive
- Dominant allele- you can have one or two of a
dominant allele and you will show that characteristsic
- A genotype is either a dominant allele or a recessive allele. A
phenotype is the outcome of the two genotypes
- Your genotype is the alleles you have
- E.g. a blue eye allele and a brown eye allele
- E.g. a blue eye allele and a brown eye allele
- Your phenotype is the characteristic you show
- E.g. brown and blue allele
- E.g. brown and blue allele
- Punnet Squares
- Punnet Squares are a way of seeing someone's phenotype
- Punnet Squares are a way of seeing someone's phenotype
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