Study

Sex linked , sex influenced traits & Family pedi ...

  •   0%
  •  0     0     0

  • 19-- Males can be carriers for color blindness. a-True b-False
    b-False
  • 12-……Is a way to predict all the possible breeding outcomes A-a pedigree B- a phenotype C- a Punnett square
    C- a Punnett square
  • 7-From examples of mutation which is a sudden change in the gene a- Color blindness b- Hemophilia c-both
    c-both
  • 3-Females have ………………… sex chromosomes.
    XX
  • 9-Explain : -Color blindness is common in males and rare in females
    Because female needs 2 recessive genes of color blindness carried on her two sex chromosome XX but male needs only one.
  • 4-Males have ………………… sex chromosomes.
    XY
  • 13-Who could a daughter inherit a sex linked allele from? a-Her mother only b-Her father only c-Either parent
    c-Either parent
  • 2- Sex chromosome X is ……………………… than Y
    longer
  • 10-………………. is a chart used to follow the inheritance of a certain trait within a family.
    Family pedigree
  • 8-Explain : Baldness is common in males not in females.
    Because male sex hormone supports the appearance of baldness But female sex hormone prevents the appearance of baldness.
  • 19-- Males can be carriers for color blindness. a-True b-False
    b-False
  • 14-An individual who is heterozygous for a recessive disorder is called a(n) ………. a-carrier b-pedigree c-autosome d-affected
    a-carrier
  • 1-Which is a mutation? A-a factor that causes all human disease B-any gene that is harmful C-a permanent change in a gene D-a piece of recombinant DNA
    C-a permanent change in a gene
  • 11-Which tool that scientists use to analyze the genetics of a family is shown below?   A-a pedigree    B- a phenotype    C- genetic engineering    D- a Punnett square
    Family pedigree
  • 17-Color blindness is X- linked recessive trait : in the Punnett square how many have Color blindness disease ? a- 50 % b- 100 % c- 25 % d-75 %
    c- 25 %
  • 19-- Males can be carriers for color blindness. a-True b-False
    b-False
  • 20- X-linked traits as color blindness appear more in males than in females a-True b-False
    a-True
  • 18- B+B+ is bald in ............................... a- males and females b- males only c- females only
    b- males only
  • 16-Colorblindness is a recessive x-linked disorder. Which genotype represents a male with normal vision?
    C
  • 5- In baldness, the male and female with the same genotype have ……………. phenotype.
    different
  • 15-Who does a son inherit a sex-linked allele from? a-His mother only b-His father only c-Either his father or mother
    a-His mother only
  • 6-Traits (genes) located on the sex chromosomes (X) are called ......................
    Sex linked traits