Question

Click Show phenotype for each combination. What are the resulting phenotypes?

Answer 1

The resulting phenotypes are 75% flies with red eyes, curly wings, brown body, and legs on the head (R-C-B-L-) and 25% flies with white eyes, normal wings, yellow body, and antennae on the head (rrccbbll).

Experiment

• In this experiment, we are performing a cross between two individuals that are heter0zyg0us for all the traits under study.

• Each trait is coded by a single diallelic gene.

• We will assume they assort independently and there is no interaction between them.

TRAITS

wing shape

• Dominant allele C codes for curly wings,
• Recessive allele c codes for normal wings

bodycolor

• Dominant allele B codes for brown
• Recessive allele b codes for yellow

antenna type

• Dominant allele L codes for legs on the head
• Recessive allele l codes forantennae on the head

eye color  

• Dominant allele R codes for red eyes
• Recessive allele r codes for white eyes

Cross

Parentals)   RrBbCcLl     x     RrBbCcLl

Gametes) RCBL, rbcl          RCBL, rcbl       ⇒  No crossing over

Punnett square)                 RCBL               rcbl

                         RCBL    RRCCBBLL       RrCcBbLl

                           rcbl     RrCcBbLl          rrccbbll

F1)

• 1/4 = 25% of the progeny is expected to be RRCCBBLL, expressing red eyes, curly wings, brown body, and legs on the head

• 2/4 = 50% of the progeny is expected to be RrCcBbLl,  expressing red eyes, curly wings, brown body, and legs on the head

• 1/4 = 25% of the progeny is expected to be rrbbccll,  expressing white eyes, normal wings, yellow body, and antennae on the head.

The resulting phenotypes are:

• 3/4 = 75% flies with red eyes, curly wings, brown body, and legs on the head.

• 1/4 = 25% flies with white eyes, normal wings, yellow body, and antennae on the head.

You can learn more about drosophila traits at

brainly.com/question/2240567

brainly.com/question/1658614

brainly.com/question/2234658