In tomatoes, dwarf (d) is recessive to tall (D), and opaque (light-green) leaves (op) are recessive to green leaves (Op). The loci that determine height and leaf color are linked and separated by a distance of 7 m. u. For each of the following crosses, determine the phenotypes and proportions of progeny produced. A. D Op/ d op*d op/d op
B. D op/ d Op*d op/d op
C. D Op/d op*D Op/op d op
D. D op/d Op*D op/d Op

a). D Op / d op X d op / d op –Parents

as we know,

Distance (m.u.) = Recombination frequency (%)

D Op / d op genotype produces 4 types of gametes as below:

Recombinant gametes (7%):

D op = 3.5% ,    d Op= 3.5%

Non-recombinant gametes (93%):

D Op= 46.5% ,   d OP =46.5%

Genotype, d op / dop produces only one type of gametes, d op.

                                                    d op

D OP (46.5%)                    D OP/d op (46.5%) = Tall, green

D op (3.5%)                        D op/d op (3.5%) = Tall, opaque

d OP (3.5%)                        d OP/d op (3.5%)= Dwarf, green

d op (46.5%)                       d op/d op (46.5%) = Dwarf, opaque

b).  similarily D op / d Op X d op / d op –Parents

Distance (m.u.) = Recombination frequency (%)

D op / d Op genotype produces 4 types of gametes similarily as in case a,

Genotype, d op / dop produces only one type of gametes, d op.

                                                            d op

D OP (3.5%)                        D OP/d op (3.5%) = Tall, green

D op (46.5%)                       D op/d op (46.5%) = Tall, opaque

d OP (46.5%)                       d OP/d op (46.5%)= Dwarf, green

d op (3.5%)                          d op/d op (3.5%) = Dwarf, opaque

c).  D Op / d op X D Op / d op -----Parents

D Op / d op genotype produces 4 types of gametes as below:

Recombinant gametes (7%):

D op = 3.5% = 0.035 , d Op= 3.5%=0.035

Non-recombinant gametes (93%):

D Op= 46.5%=0.465 ,  d OP =46.5%=0.465

The table is attached for C.

d).  D op / d Op X D op / d Op –Parents

Distance (m.u.) = Recombination frequency (%)

siliarily as a, b, and c gametes are four with the same frequency and table for the answer is attached

Recombinant gametes (7%):

D op = 3.5% = 0.035 , d Op= 3.5%=0.035

Non-recombinant gametes (93%):

D Op= 46.5%=0.465 ,  d OP =46.5%=0.465

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.