Artificial Selection of Bread Wheat

Question 1

1.

Answer 1

Wild einkorn wheat sown and cultivated to produce plants with larger grains (AuAu 2n=14)

Question 2

2.

Answer 2

Einkorn wheat is crossed with wild grass (BB 2n=14)

Question 3

3.

Answer 3

Sterile hydrid (AuB) but a mutation doubles chromosomes and produced fertile emmer wheat (AuAuBB 4n=28). This is polyploid and has larger cells.

Question 4

4.

Answer 4

Emmer wheat crossed with wild grass (DD 2n=14) produces sterile hybrid (AuBD) and a mutation doubles chromosome number.

Question 5

5.

Answer 5

This forms modern wheat (AuAuBBDD 6n=42) which is hexaploid.

Question 6

6.

Answer 6

Modern wheat is artificially selected to produce varieties that are resistant to fungal diseases, have higher protein content and increased yield.