In cows, the allele for red hair is HR and the allele for white hair is HW. In chickens, the allele for black feathers is FB and the allele for white feathers is FW. For the following
individuals, which show co-dominance, write the appropriate genotypes:
a. a red cow
b. a roan cow
c. a white bull
d. a white chicken
e. a black chicken
f. a speckled chicken

See below

Explanation:

a. a red cow HRHR

b. a roan cow HRHW

c. a white bull HWHW

d. a white chicken FWFW

e. a black chicken FBFB

f. a speckled chicken FBFW

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave