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Autosomal Inheritance Recessive And stuff disorders Autosomal Dominant & co-dominant Sex-linked Chromosome #’s testing 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 100 How many chromosomes are pictured in a karyotype of a human diploid body cell 46 200 All the other chromosomes that aren’t the sex chromosomes autosomes 300 Daily Double Because both the A and B allele are expressed in the AB blood type, it has this form of inheritance codominance 400 AC Bio A mother has blood type AB, the father is also blood type AB, what could be the possible blood types of their children AC BIO A, AB, or B 500 A child is Rh+ having the alleles, (+) (+) give all the possible Rh genotypes of people who could donate blood ++, + - , - - 100 Affects Jews Tay Sachs 200 Parents do not have the disorder, but their child does, give the genotypes of the parents and give the term that describes the parents genotype Heterozygous or carriers 300 This disorder results in thick mucus that clogs the lungs and other organs Cystic fibrosis 400 What is the percent chance that two parents who are carriers for a recessive disorder will produce a homozygous normal child 25% 500 A homozygous normal male marries a female who has PKU. She is worried about passing this trait onto her children. Does she have to worry about this, explain. AA x aa No, she doesn’t have to worry. Her husband is homozygous normal, he will always give a dominant allele and PKU is recessively inherited so no child could have the disorder Aa 100 How many dominant alleles must a person inherit to have an autosomal dominant disorder one 200 How is an autosomal dominant disorder different from a sex – linked disorder? Autosomal dominant affects autosomes. Sex-linked disorders are associated with the sex chromosomes (mainly x) 300 Autosomal dominant disorder that is fatal. Symptoms do not appear until person is in their 30’s or 40’s Huntington’s disease 400 a person suffers from achondroplasia disorder what is their genotype and what is the chance of them passing it on to their offspring Aa 50% 500 Autosomal Dominant Give the phenotypes Genotypes Phenotype Aa a. aa b. AA c. a.Disorder b. normal c. dead 100 Why do women show fewer sex linked disorders? They have 2 X chromosomes and can mask a recessive disorder if they have a dominant allele on the other. 200 Disorder in which blood fails to clot properly hemophilia 300 Who do males inherit their sex-linked disorders from? Explain Mother, they give the x chromosome. Dad gives y and nothing on that. 400 Which parental pair could produce females with colorblindness? A - Homozygous normal-vision mother, father with colorblindness B - Mother with colorblindness, normal – vision father C - Heterozygous normal vision mother, father with colorblindness C 500 – Daily double Assume this chart shows a sex linked recessive disorder: Row 2 Row 3 What would be the genotype of the daughters in the second row? What is the sex of the person who has the disorder in the third row? Give their genotype. XAXa (allele from dad who has the disorder and normal from mom) son (male) is XaY 100 Failure of chromosomes to separate Non-disjunction 200 XXXY Klinfelters 300 Honors Both missing part of chromosome #5. Children have a cry like a cat. AC Bio - All humans must be born with at least one of these chromosomes X Honors – Cru du chat 400 – daily double Which process resulted in the disorder shown below? amniocentesis 500 Give the name of the disorder shown here. A doctor would make one of these, shown above to test for genetic disorders. Trisomy – 21 Down Syndrome Karyotype