3.7.1 Inheritance Flashcards
What’s genotype
Genetic constitution of an organism
What’s phenotype
Expression of genetic constitution (genotype) and it’s interaction with the environment
What’s a gene
Section of DNA which is made of a sequence of nucleotide bases, codes for a polypeptide
What’s an allele
A different form of a gene
There can be many alleles of a single gene
Only ONE allele can occur at the locus of a chromosome
diploid organisms have homologous chromosomes, two loci which carry two alleles
What are homozygous alleles at a locus
Alleles at both loci are the SAME
What are heterozygous alleles at a locus
Two alleles at the loci (locations) are different
What’s a dominant allele
Allele in the heterozygote which is expressed in phenotype
What’s a recessive allele
Allele in the heterozygote which isn’t expressed in phenotype
What are homozygous dominant alleles
Homozygous organism with two dominant alleles
What are homozygous recessive alleles
Homozygous organism with two recessive alleles
What’s codominant alleles
Both alleles contribute to phenotype
Phenotype is a blend of both features
Steps to produce a monohybrid cross
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