Question

7.23 Female Drosophila heterozygous for ebony (etle),
scarlet (st+/st), and spineless (ss+/ss) were testcrossed, and
the following progeny were obtained:
PROGENCY PHENOTYPES NUMBER
Wild type
67
8
Ebony
Ebony, scarlet
68
Ebony, spineless
347
Ebony, scarlet, spineless 78
Scarlet
368
Scarlet, spineless
10
Spineless
54
(a) Are these genes linked? Justify your answer. (b) Write the
genes given on a chromosome symbol with the genes in
correct order. (c) Write the genotypes of the flies involved in
the parental cross and testcross. (d) What is the map distance
between the loci for ebony and scarlet? (e) What is the map
distance between the loci for ebony and spineless? (f) Cal-
culate the coefficient of coincidence.​

Answer 1

and I have a lot to say to you thin and a bit more of the kind that I think about byj is a lot of money to the people of America who hhsueueueiisue