Humans possess two alleles, or variations, for each gene. the alleles may be the same, or they may be different. when humans reproduce, their alleles are separated and independently sorted into different gametes, or sex cells. so, when sex cells randomly combine during fertilization to produce offspring, there
a. a low probability of survival.
b. an increase in genetic variation.
c. a decreased risk of mutation.
d. a high probability of producing a clone.

Compare asexual reproduction to sexual reproduction

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

Match the types of competition to their descriptions