Question

Q1) Which of the following chromosomal designations would be considered aneuploidy?

   2n
   4n, 2n+1 and 2n-1
   4n only
   2n+1 and 2n-1
   2n+1 only
   2n-1 only

Q2) Dicentric bridges and acentric fragments are produced during meiosis in a(n)

  
A. aneuploid

   
B. paracentric inversion heterozygote

   
C. paricentric inversion heterozygote

   
D. paracentric inversion homozygote

   
E. paricentric inversion homozygote

Answer 1

Answer:

Q1). 2n+1 and 2n-1

Explanation:

Aneuploidy is the presence of an abnormal number of chromosomes in a cell, for example a human cell having 45 or 47 chromosomes instead of the usual 46. It does not include a difference of one or more complete sets of chromosomes.

Q2). B. paracentric inversion heterozygote

Explanation:

At meiosis, crossing-over within the inversion loop of a heterozygous paracentric inversion connects homologous centromeres in a dicentric bridge while also producing an acentric fragment—one without a centromere.