The recessive alleles for yellow body (yb) and cut wings (cw) identify two autosomal genes on the second chromosome of drosophila melanogaster. when females, heterozygous at these two genes (yb+yb cw+cw), were crossed with yellow-bodied, cut-winged males, the following classes and numbers of progeny (out of 1000) were obtained:
a. wild type body color, wild type wings 120
b. wild type body color, cut wings 360
c. yellow body color, cut wings 140
d. yellow body color, wild type wings 380

Option D

Explanation:

Given -

recessive alleles for yellow body is (yb) and cut wings is (cw)

Genotype of female parent which is heterozygous at these two genes  - yb+yb cw+cw

Genotype of male with yellow-bodied, cut-winged is (ybyb, cwcw)

Cross between

yb+yb cw+cw & ybyb cwcw will produce following offspring

Please see the attached file

Hence, option D is correct

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.