Mistakes in Meiosis

• Karyotyping gives us the number of chromosomes, sex, shapes of chromosomes and if they are missing/have extra chromosomes.
• Karyotyping does not tell us mutations in genetics, parents, specific traits and genetic disorders.
• In meiosis, chromosomes may fail to separate properly leading to nondisjunction.
• Anaphase allows for an equal number of genes/chromosomes. They do not have to be the same, just equal.
• In nondisjunction, chromosomes do not separate properly. They can have too little or too many chromosomes. However, it is not very common.
• Nondisjunction is worse when it occurs in Meiosis I than Meiosis II.
• Zygote: fertilized egg.
• Edward Syndrome (Trisomy 18): delayed mental development, delayed organ development, lifelong, dies soon after birth.
• Down Syndrome (Trisomy 21): has many symptoms and can appear differently for every person.
• Trisomy: condition where the zygote has an extra copy of a chromosome.
• XXY: Klinefelter Syndrome
• Too much information is confusing.
• If two people with down syndrome were to have kids, it would be near impossible for the kid to survive because there would be too many chromosomes.
• There are more trisomy's than monosomies because it is easier to have too many instructions than too little instructions. Monosomies are often miscarried.