Flashcards in Peerwise Deck Deck (14)
How to work out number of sperm + egg?
2^number of heterozygous loci
What is the number of F2 genotypes?
3^number of heterozygous loci
A test cross is used to...
Determine whether an individual expressing the dominant phenotype is homozygous or heterozygous
Work out gene order in a trihybrid cross
Look at 2 double recombinants and gene that's changed is the one in the middle
To determine map distance
1. Deal with each loci in pairs
2. Identify recombinant classes
3. Distance between two loci = Number of recombinants between 2 loci / total number of offspring X 100
In genetic linkage :
A deficiency of recombinant genotypes in the gametes
If autosomal linkage
Only through female lineage
Coat colour in the mouse serves as a good example of
Genes located on the Y-chromosome and appearing only in males
The same allele has different expressions in male and female individuals.
Achondroplasia is an
Autosomal dominant disease
Phenotypic traits disappearing and then reappearing later in the phylogenetic tree.