1) For each of the following genes whether it exists in a A color-blindness gene
ID: 199002 • Letter: 1
Question
1) For each of the following genes whether it exists in a A color-blindness gene on the X chromosome in a normal human male - Agene on chromosome 2 in an individual with Down syndrome A transgenic gene inserted into only one chromosome of a mouse 2) Suppose the tail length of two populations of lizards is controlled by one gene. To determine the mode of inheritance, a homozygous short-tailed female is crossed with a homozygous long tailed male. Then siblings from the Fi are crossed, and the mumber of short-and long-tailed animals are counted to determine the phenotype ratio Match the phenotypic ratio anticipated in the offspring from a cross of two heterorygous individuals to the appropriate mode of inheritance for the short-tail allele. Cross of 3 long:1 short 1lone:3 short lonz:1 short Males 1onz:1 short females al short 3. In butterflies, sex is determined by the ZW sex-determination system Female butterfilies are heterogametic and have both a two Z sex chromosomes Select all of the relatives from which a female butterfly could have inherited her Z sex chromosome. D Paternal grandfather Father Maternal grandmother D Mother 4 Hemophilia was called the royal disease" because many of the European royal famibies had members afflicted with bemophilia Hemophilia is a sex-linked, recessive, X-chromosome disorder. It was known that Queen Victoria was unaffected but was a carrier of the bemophilia gene (XX Suppose Queen Victoria's husband, Prince Albert, was affected with hemophilia (XY). What is the percent probability that Queen Victoria and Prince Ailbert will have two affected females and an unaffected son 5. Red-green color blindness is an X-linked recessive trait in bumans Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. If Bill and Martha marry, what proportions of children with specific phenotypes would they be expected toExplanation / Answer
Question 2
SS* ss > Ss
Ss* Ss > SS,Ss, Ss, ss
Autosomal dominant- all short tailed- 1 long: 3 short
Autosomal recessive- all long tailed- 3 long: 1 short
XX * XY > XX, XY, XX, XY
If the trait is dominant then will be present unequally among sexes,
Sex linked dominant- All short tailed- Males 1 long; 1 short; females all short
Sex linked recessive- 1: long : 1 short
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