Yellow squash Y is dominant over white squash y. A cross between YY and yy occurs. What are the phenotypic percentages?

By crossing a yellow squash (YY)  with a white squash (yy) , the phenotypic percentage of the offspring is 100% yellow squash (Yy).

Explanation:

The crossing of two pure lines -with identical alleles for a trait- dominant and recessive produces a hybrid or heterozygous offspring, with different alleles for that trait.

In this case, the yellow squash is homozygous dominant, while the white squash is recessive, obviously homozygous.

YY  X  yy

Alleles      Y     Y

y             Yy    Yy

y             Yy    Yy

All the offspring will have a Yy genotype and a single yellow squash phenotype for 100% of them.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.