63. An allele that is present but unexpressed isdomi A. recessive B. functional D, redundant 64. The classes of RNA molecules made in cells include all of the following except A. cRNA B. rRNA C.IRNA D. mRNA 65. Ribosomes are complex arangemef A. RNA and DNA B. RNA and sugars C. DNA and proteins D. RNA and large proteins DNA and proteins 66. Linked genes are A. found on the sex chromosomes B. found in the same nucleus C. joined by a centromere D. found on the same chromosome 67. The genetic make-up of an individual is referred to as its A. phenotype B. genetic pattern C. genotype D. allelotype 68. A cross between plants which differ in two traits is called a cross. A. homozygote B. monohybrid C. dihybrid D. true breed 69. Both DNA and RNA are made up of building blocks known as A. amino acids B. nucleotides C. complementary base pairs D. genes 70. Information obtained by Franklin from X-ray crystallography on DNA suggested that it is a A. ribbon B. hollow cylinder C. helix D. pleated sheet 71. A diploid organism that has two identical alleles for the same trait is called particular trait. for that A. heterozygous B. homozygous C. dominant D. recessive 72. Individuals carrying two copies of each chromosome are A. diploid B. haploid C. homozygous D. heterozygous