If an adult wild mouse has 40 chromosomes, how many chromosomes will it have in its sperm cells?

The answer to this question would be, If a [adult] mouse has 40 chromosomes, then a mouse zygote should and must as well because that number of chromosomes is what makes a mouse. Anyway it is 40 Chromosomes. i hope i helped
 

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.