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Name _____________________________________Date___________Period______Should This Dog Be Called Spot?Background InformationChromosomes are made up of DNA which contains the genetic information for an organism. Different organisms have different numbers of chromosomes. For example, dogs have 78 chromosomes while humans have 46. When a sperm cell from a male dog joins with an egg cell from a female dog, a fertilized egg is created. The sperm and egg cells each contain 39 chromosomes. The resulting fertilized egg cell contains 78 chromosomes.Imagine that you could look inside one pair of the fertilized egg’s chromosomes. Each chromosome of the pair contains genes for the same trait. But, one chromosome may have the dominant allele of the gene and the other the recessive allele of the same gene. Directions:3152775481330Use the diagram and chart to answer questions 1-8.Hair LengthHair TextureHair CurlinessCoat PatternDominantAlleleLong (L)Bristly (B)Curly (C)Spotted (S)Recessive AlleleShort (l)Silky (b)Straight (c)Solid (s)Does the female dog have a spotted coat? Explain why or why not.Does the male dog have a spotted coat? Explain why or why not.Would the new puppy have a spotted coat? Explain why or why not.Are the alleles for the puppy’s new coat pattern homozygous or heterozygous? Explain your answer.Would you call the new puppy “Spot”? Explain why or why not.What would the puppy’s hair texture be? Are the alleles for the puppy’s hair texture homozygous or heterozygous? Explain your answer.What would the puppy’s hair curliness be? Are the alleles for the puppy’s hair curliness homozygous or heterozygous? Explain your answer.What would the puppy’s hair length be? Are the alleles for the puppy’s hair length homozygous or heterozygous? Explain your answer. ................
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