genetic, Biology

Assignment Help:
1. The genes for ruby eyes (rb), tan body (t) and cut wings (ct) are all found on the X-chromosome of Drosophila melanogaster. All of these are recessive traits. They map in the order rb, ct, t with 12.5 map units between rb and ct and 7.5 map units between ct and t. Suppose you cross a cut wing male with a homozygous female that is both tan and has ruby eyes.
a. What will the F1 females look like?
b. Draw map of the section of the X chromosomes that has these 3 genes for the F1 females
c. Assume you testcross your F1 females.
i. What progeny classes would you expect?
ii. Give approximate numbers for each class based on a total of 2000 progeny.
1. Assuming the i=1 and there are no double crossovers.
2. Assuming the i=0 and there are the expected number of double crossovers.


Related Discussions:- genetic

Long-chain fatty acids, Fatty acid breakdown brings about the oxidation of ...

Fatty acid breakdown brings about the oxidation of long-chain fatty acids. The fatty acids are first transformed to their acyl CoA (coenzyme A) derivatives and then degraded by the

Define functions of pyridoxine, Define Functions of Pyridoxine? There a...

Define Functions of Pyridoxine? There are three different forms of vitamin B6, namely pyridoxine, pyridoxarnine, and pyridoxal. All three must be phosphorylated and the 5'-phos

Why women considered the weaker sex, The Y chromosome (for males) is less p...

The Y chromosome (for males) is less protective against hereditary diseases than the X chromosome. Why then are women considered the weaker sex?

Explain restriction endonucleases are enzymes, Restriction endonucleases ar...

Restriction endonucleases are enzymes which: 1. make cuts at specific positions within the DNA molecule 2. recognize a specific nucleotide sequence for binding of DNA ligase

Explain about vascular cambium, How can the age of a tree be estimated from...

How can the age of a tree be estimated from the analysis of the rings present on a cross section of its stem? For the growth of the tree it is essential to have formation of ne

How much dna is in a typical human cell, Q. How much DNA is in a typical hu...

Q. How much DNA is in a typical human cell? If DNA (deoxyribonucleic acid) molecules in a single human cell were stretched out and laid end to end they will measure approximate

Tracheal system in cockroach, Tracheal system in cockroach Cockroach...

Tracheal system in cockroach Cockroach belongs to phylum Arthropoda under invertebrate. They have specially developed tracheal system for respiration The system consis

Explain the rotary dryers, Explain the Rotary Dryers? Rotary dryers are...

Explain the Rotary Dryers? Rotary dryers are widely used to dry relatively large throughputs of granular products and by products in a number of industries, including the food

Nested brackets as a cladogram, using either nested brackets as a cladogram...

using either nested brackets as a cladogram, what are the hierarchical relationships among the followingtaxa:raniates, amniotes, mammals, actinopterygians, chondrichthyes, aves, ve

Explain about rna molecules, Explain how early RNA molecules might have bee...

Explain how early RNA molecules might have been able to respond to natural selection. Every RNA molecule might have competed with slightly dissimilar RNA molecules for nucleoti

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd