Phenotypes/Alleles/Mendel Flashcards
Phenotype
Physical traits (resulting from genotype)
Genotype
Genetically traits
Gene
A section of DNA that codes for a specific sequence of amino acids
Alleles
Different versions of the same gene
Heterozygous
Having two different alleles
Homozygous
Having two identical alleles of a gene
Dominant
An allele that is always expressed
Recessive
An allele that is only expressed in the presence of a Dominant allele
Heredity
Passing on traits through generations
Mono hybrid inheritance
Inheritance of a single characteristic
Who was Mendel?
“The Father of Genetics”
He carried out genetic experiments with pea plants
What did Mendel notice about offspring characteristics in plants?
They were passed on from one generation to the next
What 3 important conclusions did Mendel reach?
- Characteristics in plants are determined by hereditary units
- Hereditary units re passed on to offspring unchanged from both parents, one unit from each parent
- Hereditary units can be recessive or dominant
Useful device for predicting the possible offspring of cross between different genotypes
Punnet square