1) How many chromosomes are in a typical human somatic cell? a) 22 b) 23 c) 24 d) 44 e) 46 f) 48 2) How many chromosomes are in a typical human gametic cell? a) 22 b) 23 c) 24 d) 44 e) 46 f) 48 3) How many chromosomes are found in a typical human zygote? a) 22 b) 23 c) 24 d) 44 e) 46 f) 48 4) Which type of cells combine in order to form diploid cells? a) egg b) blood c) sperm d) skin e) heart f) uterus 5) Which describes the steps of protein synthesis? a) DNA transcribes RNA which translates proteins b) RNA transcribes DNA which translates proteins c) RNA translates DNA which transcribes proteins d) DNA translates RNA which transcribes proteins 6) If a disease is X-linked recessive (Xd), which of the following individuals could have the disease? a) XDY b) XdY c) XDXd d) XDXD e) XdXd 7) In pedigree charts, males are expressed as... a) shaded b) squares c) unshaded d) circles 8) Which cells are haploid? a) egg b) sperm c) kidney d) liver e) heart f) skin 9) Which genotypes could be considered heterozygous? a) AA b) XAXa c) AB d) aa e) Aa f) XaXa 10) If there are 14 chromosomes in an unfertilized egg, how many chromosomes are found in the fertilized egg? a) 7 b) 14 c) 26 d) 28 e) 37 f) 46 11) Which 4 nitrogenous bases are found in DNA molecules? a) GTAC b) GUAC 12) A cross between giraffes with short necks (nn) and long necks (NN) produce giraffes with medium necks. Which inheritance pattern is this? a) Complete dominance b) Incomplete dominance c) Codominance d) Multiple alleles e) Polygenic f) X-linked 13) A cross between blue fish (XB) and yellow fish (XY) produce blue-and-yellow fish. Which two inheritance patterns are shown? a) Complete dominance b) Incomplete dominance c) Codominance d) X-linked e) Polygenic 14) A chain of 5 amino acids require a total of ______ DNA nucleotide bases to code. a) 3 b) 5 c) 10 d) 15 e) 20 15) Mutations can be passed on to offspring through which of the following cells? a) blood cells b) egg cells c) brain cells d) sperm cells e) skin cells f) liver cells 16) Which of the following is true of crossing over? a) It occurs during mitosis b) It occurs during meiosis c) It is when genes are exchanged between homologous pairs d) It decreases diversity e) Its when 2 alleles are separated f) It increases diversity 17) Select all that apply: Egg and sperm cells are... a) haploid b) diploid c) somatic d) gametic 18) Select all that apply: A zygote is... a) haploid b) diploid c) somatic d) gametic

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