2.Black fur(B) in guinea pigs is dominant over white fur(b). Find theprobability of an offspring with the same phenotype as its parents in across between a homozygous black and a heterozygous black guineapig .A. 0%,

25%B.25%,

25%C.50%,50%

D.75%, 25%

E.100%, 0%

Option d: black 75%, white 25%

Explanation:

The cross is between a homozygous black and a heterozygous black guinea pig

Parents gen. BB x Bb

F1 generation BB Bb Bb bb

The probability of an offspring with the same phenotype as its parents is

Genotype: BB - 25% and Bb - 50%, bb-25%

Phenotype: black 75%, white 25%

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.