1) Which chemical are chromosomes and genes made from? a) carbohydrates b) proteins c) DNA d) fats 2) Which part of a cell contains the genetic material? a) cytoplasm b) nucleus c) mitochondria d) cell membrane 3) What word describe an organisms characteristics (physical features) i.e. a persons eye colour a) genotype b) phenotype c) chromosome d) allele 4) What word describe the combination of genes / alleles an organism has i.e. BB a) genotype b) phenotype c) nucleus d) DNA 5) B = allele for brown eyes. b = allele for blue eyes. A person with brown eyes has the alleles Bb. Is B dominant or recessive? a) dominant b) recessive 6) B = allele for brown eyes. b = allele for blue eyes. A person with brown eyes has the alleles Bb. Is b dominant or recessive?  a) dominant b) recessive 7) What is the name of a piece of DNA which codes for a characteristic?  a) gene b) nucleus c) phenotype d) genotype 8) What type of substance is made using the DNA code? a) fat b) protein c) starch d) sugar 9) A man has the alleles hh.  What word describes the alleles of the man? a) homozygous  b) heterozygous  c) phenotype 10) The allele for having cystic fibrous is recessive (h). The allele for not having cystic fibrous is dominant (H). A man and woman both have Hh. What is the chance their child will have cystic fibrous?  a) 25 % b) 50 % c) 75 % d) 100 % 11) Give one characteristic of the fish controlled only by the genes it has inherited from its parents  a) eye colour  b) scar c) length 12) A cat breeder noticed that four kittens from one Siamese cat mother had a new blue colour at the tip of their tails. What has caused the new colour to appear? a) Fertilization b) Mitosis c) Mutation 13) Give the combination of sex chromosomes present in a female cat. a) YY b) XX c) XY 14) T = allele for tall. t = allele for short. A tall plant (TT) and short plant (tt) reproduce to produce 100 offspring. How many of these offspring would be tall? a) 100 b) 75 c) 50 d) 25 e) 0 15) What is a mutation? a) A change in a gene b) Accidental damage to an organism c) An organism with a new characteristic d) The loss of a species 16) T = allele for tall. t = allele for short. A scientist crossed Plant 1 with Plant 2. All offspring were tall. Give the genotype of Plant 1. a) TT b) Tt c) tt 17) T = allele for tall. t = allele for short. A scientist crossed Plant 1 with Plant 2. All offspring were tall. Give the genotype of Plant 2. a) TT b) Tt c) tt

Genetics

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