This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: 2 2 4 8 2 n No. of different genotypes in F 2 3 9 27 3 n Here's what the cross looks like for two of Mendel's traits combined, flower color and pod characteristics. One allele for each goes in each gamete; purple color (P) is dominant over white (p) flowers, and inflated pods (I) are dominant over constricted (i). Self pollinate the F 1 purple flowered, inflated pod plants and what is the F 2 ratio? Not 3:1 anymore. Fill out a Punnett square and see the possibilities. Each gamete gets one allele of each trait, so a dominant purple (P) can have either a dominant inflated pod (I) or a recessive constricted pod (i); ditto the white (p). Thus, four kinds of gametes are possible: PI, Pi, pI, pi and 4 × 4 combinations are possible from the two parents:...
View Full Document
This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.
- Fall '08