X-inactivation is not random, the fathers x-chromosome in a daughter is always inactivated? TRUE OR FALSE Help please!

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine