In: Biology
Hagrid is interested in breeding Hippogrifts, a magical creature with the head and wings of an eagle and the body, rear legs and tail of a horse. Hippogrifts usually have steal color beak (b+), orange eyes (r+) and sharp talons (d+). In a cross between a true-breeding Hippogrift with a black color beak(b) and orange eyes (o+) and sharp talons male (d+) and a very rare-true breeding Hippogrift with a steal (b+), ruby eyes (r) and dull talons (d). He obtains only F1offspring with steal color beaks (b+), orange eyes (r+) and sharp talons (d+). However, if the F1 males were bred to the rare Hippogrift with a black (b) beak, ruby eyes (r) and dull talons (d), he obtains the following Hippogrifts. Hagrid was very confused with this data. He asked Hermonine to explain the outcome to him.
F2 data
B |
R |
D |
# Hippogrifts |
b |
r |
d |
54 |
b+ |
r+ |
d+ |
50 |
b+ |
r+ |
d |
12 |
b |
r |
d+ |
10 |
b |
r+ |
d+ |
407 |
b+ |
r |
d |
412 |
b+ |
r |
d+ |
38 |
b |
r+ |
d |
34 |
Total |
1000 |
Draw the map of the 3 genes showing their relative distances.
What is the interference?
Answer-
Map distance between b and r is 12.6 mapunitsm r and d is 9.4 mapunits.
Interference = -0.86
The calculation is given below: