Chromosomal Inheritance
Biology ⇒ Genetics and Heredity
Chromosomal Inheritance starts at 11 and continues till grade 12.
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A female with only one X chromosome (XO) has which syndrome?
A male with an extra X chromosome (XXY) has which syndrome?
A person with three copies of chromosome 18 has which condition?
Describe the chromosomal basis of Mendel’s law of segregation.
Describe the role of the centromere during cell division.
Describe what is meant by 'genetic linkage'.
Describe what is meant by the term 'homologous chromosomes'.
During meiosis, when does crossing over occur?
Which chromosome abnormality is associated with Down syndrome?
(1) Trisomy 13
(2) Trisomy 18
(3) Trisomy 21
(4) Monosomy X
Which of the following best describes a karyotype?
(1) The number and appearance of chromosomes in a cell
(2) The sequence of DNA bases in a gene
(3) The process of crossing over
(4) The physical location of a gene on a chromosome
Which of the following best describes the law of independent assortment?
(1) Genes located on the same chromosome are always inherited together.
(2) Alleles of different genes assort independently of one another during gamete formation.
(3) All chromosomes are inherited as a single unit.
(4) Chromosomes do not segregate during meiosis.
Which of the following best explains why siblings from the same parents can look different from each other?
(1) Mutations in somatic cells
(2) Crossing over and independent assortment during meiosis
(3) Environmental factors only
(4) Identical DNA sequences
If a gene is located on the X chromosome, it is said to be __________.
The exchange of genetic material between homologous chromosomes increases genetic __________.
The failure of homologous chromosomes to separate during meiosis is called __________.
The location of a gene on a chromosome is called its __________.
If a male inherits an X-linked recessive allele from his mother, will he express the trait?
True or False: All chromosomal mutations are inherited from parents.
True or False: All genes on the same chromosome are always inherited together without exception.
True or False: Chromosomal mutations can involve changes in chromosome structure or number.
