Assuming independent assortment, an individual of genotype ssyyaa would produce gametes of genotypes (in their correct proportions) see section 14.3 (page 297) .

1/8 SYA, 1/8 SYa, 1/8 SyA, 1/8 Sya, 1/8 sYA, 1/8 sYa, 1/8 syA, 1/8 sya

Explanation:

The given genotype is heterozygous for three genes. Considering that all the genes assort independent of each other, the given genotype will form a total of 2^3= 8 types of gametes in equal proportion. During gamete formation, two alleles of a gene (S and s, Y and y, A and a) would separate from each other randomly. This would form a total 8 different types of gametes with the following genotype:

1/8 SYA: 1/8 SYa: 1/8 SyA: 1/8 Sya: 1/8 sYA: 1/8 sYa: 1/8 syA: 1/8 sya

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.