Predict the genotypic ratios of the offspring from crossing the following: Tt x Tt

1:2:1
3:1
9:3:3:1
1:4

1:2:1

Explanation:

1 chance of having the genotype TT

2 chances of having the genotype of Tt

1 chance of having the genotype of tt

individual oxygen atoms are formed during photosynthesis.-c.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.