BIO 281 Lecture Notes - Lecture 9: Allosome, Genotype, Punnett Square
Document Summary
Sometimes we are interested in how more than one phenotype will be passed down (multiple genes) Bb x bb --> 1/2 bb, 1/2 bb. What is the probability that you will get an offspring that is aabbif both parents are aabb. Aa x aa --> 1/4 aa, 1/2 aa, 1/4 aa. Bb x bb --> 1/4 bb, 1/2 bb, 1/4 bb. Assume that a and b are both dominant alleles. Aa x aa = 3/4 a_, 1/4 aa. Bb x bb = 3/4 b_, 1/4 bb. The traits we have considered until now were on autosomes(non-sex chromosomes) X-linked traits: same phenotype expression patterns as autosomal traits for females (whether dominant or recessive); different pattern for males. Xaxax xay (female with two dominant alleles and a male with one x recessive chromosome) Males always inherit their one x chromosome form mom.
