VCE Biology 11 Unit 2: Corn Dihybrid Question

[shahifa]

Hi there,

I'm struggling on these questions for this practise experiment called "A dihybrid cross in a maize'. I'll link the page of questions but also write it out if its unable to open. If anyone could please assist me pretty quickly that would be much appreciated, as its due tonight

Thanks!

(Questions)
- Consider the coloured smooth corn kernels of the F2 generation. What kind of experiment could be done to determine their genotype?
- Discuss how corn from the F2 generation could be crossed to regenerate purebred lines of coloured smooth and colourless wrinkled corn

[Bri MT]

I can't see your link but:

- Consider whether smooth or wrinkled is dominant and whether coloured or colourless is dominant. You should be able to find this from the information you're provided in the question & figure out the the genotypes of each of the F2 generation groups

The 9:3:3:1 ratio should always give you a hint about what's dominant and what's recessive when you do a dihybrid heterozygous cross.

- what would the outcome of a heterozygous cross be? What if it was a homozygous cross?


Please feel free to reply back if you have remaining questions!

[shahifa]

I can't see your link but:

- Consider whether smooth or wrinkled is dominant and whether coloured or colourless is dominant. You should be able to find this from the information you're provided in the question & figure out the the genotypes of each of the F2 generation groups

The 9:3:3:1 ratio should always give you a hint about what's dominant and what's recessive when you do a dihybrid heterozygous cross.

- what would the outcome of a heterozygous cross be? What if it was a homozygous cross?


Please feel free to reply back if you have remaining questions!

Sorry for it not being accessible, its probably because of being a HEIC format. Anyways I submitted my answers but I'm still doubting it. Tell me what you think of it though!

- A test cross would be the most ideal experiment, where a homozygous recessive will cross with either a heterozygous or homozygous dominant (since coloured/smooth is dominant)
- Test cross will be conducted with a cross between homozygous recessive to produce colourless/wrinkle from F2 generation.  A cross between homozygous dominant to produce color/smooth from F2 generation.

I hope that makes sense or am on the right track