Chromosomal Inheritance
Biology ⇒ Genetics and Heredity
Chromosomal Inheritance starts at 11 and continues till grade 12.
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See sample questions for grade 12
A geneticist observes that two traits are inherited together more often than expected by chance. What does this suggest about the genes controlling these traits?
A woman who is a carrier for hemophilia (an X-linked recessive disorder) marries a normal man. What is the probability that their son will have hemophilia?
A woman with genotype XX and a man with genotype XY have a child. What is the probability that the child will be male?
Describe how nondisjunction can lead to genetic disorders.
Describe the chromosomal basis of Mendel’s law of segregation.
Describe the difference between monosomy and trisomy.
During which phase of meiosis do homologous chromosomes separate?
A geneticist observes that two traits are inherited together more often than expected by chance. What does this suggest about the genes controlling these traits?
A male with Klinefelter syndrome has which of the following sex chromosome combinations? (1) XX (2) XY (3) XXY (4) XYY
If two genes are located very close together on the same chromosome, what is the expected recombination frequency between them? (1) 0% (2) 50% (3) Close to 0% (4) Close to 100%
Which chromosome determines the sex of a human child? (1) X chromosome from mother (2) X chromosome from father (3) Y chromosome from father (4) Y chromosome from mother
Which of the following best describes homologous chromosomes? (1) Chromosomes that are identical in sequence (2) Chromosomes that carry the same genes but may have different alleles (3) Chromosomes that are only found in males (4) Chromosomes that are only found in females
Fill in the blank: The exchange of genetic material between homologous chromosomes during meiosis is called __________.
Fill in the blank: The failure of homologous chromosomes to separate during meiosis is called __________.
Fill in the blank: The location of a gene on a chromosome is called its __________.
Fill in the blank: The observable characteristics of an organism are called its __________.
True or False: All chromosomal mutations are harmful to the organism.
True or False: All genes on the same chromosome are always inherited together.
True or False: Crossing over increases genetic variation in gametes.
True or False: Linked genes are always inherited together unless crossing over occurs between them.
