This is a dihybrid cross true breeding parents ssyy

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: hosen randomly Segrega3on during meiosis Defini3ons Gamete Diploid/haploid Chromosome Gene Locus Allele Homozygous/ heterozygous •  Dominant/recessive •  •  •  •  •  •  •  Mendel’s 2nd Law of Heredity: Independent Assortment Mendel’s next experiment: •  Crossing peas that differed in two characters—seed shape and seed color. •  This is a DIHYBRID cross True-breeding parents: •  SSYY: •  ssyy: spherical yellow seeds wrinkled green seeds The results of the dihybrid cross: Independent assortment of the 2 loci SY sy sy sy SsYy SsYy ssyy With Independent Assortment Without Independent Assortment Why did independent assortment occur? Is there any case where it wouldn’t? Mendel’s 2nd Law: The Law of Independent Assortment 1.  Alleles of different genes assort independently during gamete formation if they are on different chromosomes. •  That is, chromosomes assort independently. 2.  Genes close together on the same chromosome are physically linked and generally do no assort independently. •  As you’ll see, when genes on the same are widely separated they may recombine so frequently that it appears as if th...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online