A laboratory uses Fig. 1 to show students how identical lambs can be produced from cells of a prize ewe. The nucleus is removed from an unfertilised egg cel...
Question 1 Report
A laboratory uses Fig. 1 to show students how identical lambs can be produced from cells of a prize ewe. The nucleus is removed from an unfertilised egg cell. A nucleus from a body cell of the prize ewe is put into the egg cell. An electric pulse starts cell division, and the embryo is placed into a surrogate mother.
(a) Identify the technique shown. [1]
(b) Identify which animal provides the genes of the cloned lamb. [1]
(c) Explain why the cloned lamb has the same genetic information as the prize ewe. [2]
(d) Give one advantage of cloning a ewe with high milk production. [1]
(e) Give one concern about producing many cloned animals. [1]
Answer Details
(a) Cloning / nuclear transfer [1] (b) The prize ewe / body-cell nucleus donor [1] (c) The nucleus contains the genetic information / chromosomes [1]; the nucleus came from the prize ewe, so the embryo has the same genes [1] (d) More animals with high milk production can be produced [1] (e) Low genetic variation means a disease could affect many animals / animal welfare concerns / low success rate [1]
Download The App On Google Playstore
Everything you need to excel in your exams
