Bio question (1 Viewer)

[lyounamu]

What's the core difference between cytokinin and auxin and gibberellin?

They are both plant hormones that promote growth but I cannot really differentiate the functions of both hormones. Thanks!

Another question: do you guys know what abscisic acid is?

 

[danz90]

I don't believe that knowing them and their functions is required for the NSW Bio Prelim and HSC Syllabuses.
All I know is that those hormones are responsible for plant growth in some way.
I think abscisic acid is another plant hormone.

 

[lyounamu]

I don't believe that knowing them and their functions is required for the NSW Bio Prelim and HSC Syllabuses.
All I know is that those hormones are responsible for plant growth in some way.
I think abscisic acid is another plant hormone.

I am aware of the fact that they are not in the syllabus. They are apparently learnt in the university 1st year. But I need to know for my personal reasons.

Thank you.

 

[midifile]

They all have kinda similar functions but if you want to be specific:

cytokinin
-affects root growth and differentiation
-stimulates cell division and growth
-stimulates germination

auxin:
-stimulates stem elongation, root growth, cell differentiation and branching
-regulates development of fruit
-promotes xylem differentiation

gibberellins:
-promotes seed and bud germination, stem elongation and leaf growth;
-stimulates flowering and development of fruit
-affects root growth and differentiation

Abscisic acid is also a plant hormone which can inhibit growth, close stomata during water stress and promote seed dormancy

 

[lyounamu]

They all have kinda similar functions but if you want to be specific:

cytokinin
-affects root growth and differentiation
-stimulates cell division and growth
-stimulates germination

auxin:
-stimulates stem elongation, root growth, cell differentiation and branching
-regulates development of fruit
-promotes xylem differentiation

gibberellins:
-promotes seed and bud germination, stem elongation and leaf growth;
-stimulates flowering and development of fruit
-affects root growth and differentiation

Abscisic acid is also a plant hormone which can inhibit growth, close stomata during water stress and promote seed dormancy

Thanks.

Another ones:

What are the differences among these:
Autosomal dominant.​

​

Autosomal recessive. ​

​

X-linked dominant. ​

​

X-linked recessive. ​

Maternal inheritance

 

[midifile]

Autosomal dominant: A trait /characteristic coded for by a dominant allele on any chromosome apart from the X or Y chromsomes.

Autosomal recessive: A trait/characteristic coded for by a recessive allele on any chromosome apart from the X or Y chromsomes

X-linked dominant: Coded for by a dominant allele located on the X chromosome. X linked traits do not exhibit normal inheritance. A male with the trait will pass it on to all of his daughters and none of his sons and a female may (but not always) pass it on to her daughters or sons. Examples of X linked dominant traits are vitamin D-resistant rickets adn incontinentia pigmentii. More females are likely to have these traits then men.

X-linked recessive: Coded for by a recessive allele located on the X chromosome. A female with the trait will pass it on to all of her sons, all the daughters of a male with the trait will be carriers, but will not actually by affected by the disorder unless the mother is affected or is a carrier. If both parents have the trait all children will be affected. Examples of X linked recessive trats are haemophilia, Duchenne muscular dystrophy and red-green colour vision. More males are likely to have these traits then females.

Maternal inheritance: Im not so sure what you mean with maternal inheritance. I'm guessing its just the allele that you inherit for a particular trait from your mother.