Heterozygous alleles are found on chromosomes

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

Which short-term environmental change is most likely to lead to ground shifting, landslides, and the collapse of buildings or roads? forest fires flooding earthquakes

If a human has 23 pairs of chromosomes in every muscle cell of its body how many chromosomes will be in a human egg or sperm