geneticsanswers1

geneticsanswers1 - GENETICS PROBLEM SET I: ANSWERS 1. Both...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
G ENETICS P ROBLEM S ET I: A NSWERS 1. Both parents are black, but they produce white offspring. The cross must be Bb x Bb 2. Bb x bb; all the black offspring are Bb a. Bb x Bb; offspring genotypes 1BB: 2Bb: 1bb; phenotypes 3 black: 1 white b. Bb x bb; offspring genotypes 1 Bb: 1 bb; phenotypes 1 black: 1 white 3. Sepia females are ss. (Using a + instead of a capital letter is standard practice in Drosophila genetics; wild type is the phenotype that is seen in nature; it is usually dominant) The cross is s+s+ x ss. Offspring are all s+s The next cross is s+s x ss. Offspring genotypes 1 s+s: 1 ss; phenotypes 1 wild type: 1 sepia 4. The long-haired male is genotype ll. To produce an ll offspring, the short-haired female must be Ll. The cross is Ll x ll; expected offspring genotypes 1Ll: 1ll; Half (4) of the offspring should be long-haired. 5. Ww x Ww; possible offspring are WW (wire), Ww (wire), ww (smooth). Crossing each offspring with ww:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

geneticsanswers1 - GENETICS PROBLEM SET I: ANSWERS 1. Both...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online