1) Alleles are a) the X and Y chromosomes b) Alternative versions of a DNA sequence c) Chromosomes with the same genes d) A fertilized egg 2) Genes are a) Cell division for growth and repair b) A sex cell (eg sperm, ovum, pollen, ovule) c) A permanent change in the base sequence of DNA d) Section of DNA that codes for a particular protein/characteristic 3) Which of these characteristics are controlled by single genes (two answers) a) red-green colour blindness b) eye colour in humans c) mouse fur colour d) hair colour in humans 4) Fertilization is a) Cell division for growth and repair b) The name given to two alleles a person has for a gene c) When a male and female gamete fuse to form a zygote 5) Zygotes are a) The name given to alleles that are always expressed when present b) fertilised eggs c) The allele which is only expressed if the dominant allele is not present 6) Gametes are a) Normal body cells b) Alternative versions of a gene c) Sex cells (eg sperm, ovum, pollen, ovule) 7) Meiosis a) The allele that is always expressed when present b) The two alleles of a gene are different c) A fertilised egg d) Cell division to produce gametes 8) Mitosis is a) A permanent change in the base sequence of DNA b) Cell division for growth and repair c) Thread-like structures made of DNA that carry the code to make proteins d) The allele that is always expressed when present 9) Genotype is a) The allele that is always expressed when present b) The allele that is not expressed unless there are two copies c) Thread-like structures made of DNA that carry the code to make proteins d) The name given to the two alleles the person has for a gene 10) Phenotype is a) The two alleles a person has for a gene b) The physical characteristic or feature c) Section of DNA that codes for a particular protein/characteristic d) Alternative versions of a gene 11) Dominant Allele a) The allele inherited from the mother b) The allele inherited from the father c) The allele that is always expressed when present d) The allele that is not expressed when present unless there are two copies 12) Recessive Allele a) Cell division for growth and repair b) The allele which is only expressed if the dominant allele is not present c) A sex cell (eg sperm, ovum, pollen, ovule) d) The physical characteristic or feature 13) Homozygous means a) There are alternative versions of a gene b) The two alleles of a gene are different c) The two alleles of a gene are the same 14) Heterozygous means a) The two alleles of a gene are different b) The two alleles of a gene are the same 15) Chromosomes are a) Thread-like structures made of DNA that carry the code to make proteins b) The name given to sex cells (eg sperm, ovum, pollen, ovule) c) When two alleles of a gene are different d) when two alleles of a gene are different 16) Meiosis produces a) genetic variation offspring b) identical offspring 17) A Punnet square is a) A device for measuring mutations b) A type of genetic diagram 18) What is FF? a) A dominant allele  b) A recessive allele 19) What is ff? a) A dominant allele  b) A recessive allele  20) An XX parent is a) Male  b) Female 21) An XY parent is a) Male  b) Female 22) An XX and XY breeding produce what ratio of males to females in the offspring a) 3:1 b) 1:3 c) 1:1 23) The classic heterozygous parents cross produces what ratio in the offspiring ? a) 3:1 b) 1:1 c) It depends 24) FF and ff would be a) a monohybrid cross b) a polyhybrid cross c) a heterozygous cross 25) FF and ff , where F is the dominant allele (for red flowers) and f the recessive (for white flowers) would give  a) a 1:1 ratio red to white b) all red c) a 3:1 ratio red to white d) a 3:1 ratio white to red e) all white flowers 26) Which image represents incomplete dominance? a) b) 27) DNA is a) double helix b) single helix 28) The DNA model components include a) ribose sugar, A-T, C-G bases b) ribose sugar and nucleotide c) five carbon sugar, nitrogen bases and phosphate d) deoxyribose sugar and phosphate group e) deoxyribose and A-C; G-U bases

Genetics

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