axial and terminal?

Question

What will be the ratios of genotypes and phenotypes of the F1 gen. resulting from the following cross: axial-red (true breeding) X terminal white?

I'm not asking for the answer, but what does it mean they they describe the flowers as axial and terminal.

scratch that, i got it, but how do i explain that F1 is all pink. does it have to do with the red flower less open to the sun compared to the white, so it doesnt have enough pigment, so the white shows up more than it should?

Answer 1

OK, so you know that axial means that the flowers are growing out of the leaf angle where it fastens to the stem while terminal means that the flowers are at the ends of the stem and branches.

Pink flowers occur when there is incomplete dominance. In incomplete dominance, crossing two true-breeding individuals yields a phenotype that is an intermediate - something in between the two parental types. In this case, red crossed with white makes pink. It doesn't have anything to do with the sun. It's just the way those particular alleles interact. Other examples of incomplete dominance are watermelon shapes (round x long --> oval) and some colors in mice (white x black --> gray).

Answer 2

Axial Flowers

Answer 3

It's not clear from your question, but to me it looks like there are two traits that you are monitoring. The first is axial vs terminal and the second is red vs white. You also don't explain what the inheritance pattern is. Is it simple dominant/recessive? If so which is dominant? Codominance? Incomplete dominance? If these really are two traits as I expect, are they linked? If so, how closely?

Answer 4

For the best answers, search on this site https://shorturl.im/avXb1

Such genes are designated by a single letter of your choice and dominant and recessive genes(alleles) are indicated by a capital and a small letter respectively.