I'm in dire need of help with biology :(

[ConnorTheKid]

I'm having a huge test tomorrow and I NEED to know the following things for the test:

the main differences between phenotypes and genotypes.

what a genotypic ratio and a phenotypic ratio is.

how Mendel's dihybrid crosses help him develop the law of independent assortment.

if you're working with 2 tall pea plants and know that one is Tt, how can you determine the genotype of the other plant?

I really need all the help I can get so any reply is appreciated

 

[1337marth]

I would help you, but I just started my course in biology, i suggest trying google, or ask.com.
They may be helpful
ALso 700th post..

 

[Mazaloth]

The genotype is the genetic composition of a organism. ( Such as the gene to have red hair.)
The Phenotype is a observable trait in an organism. (Such as actually having red hair.)
An organism can have multiple genes for a hair color (Like red, vlack, or blond), this would be the Geneotype, however, even if a person has the gene to have red hair, he/she can also have a gene to have black hair, what ever gene dominates and physically shows is the Phenotype.

 

[slave1]

well about the Tt plant, is the T the dominate trate, if it is than the other will have T in it. to be certain about the second letter you have to know the other parents traits were.


but its been a while. if i had a quick review. i could totally own your questions

 

[Azua]

Science thread.