A student whose hobby is fishing pulled a carp out of Cayuga Lake that was very unusual: it had no scales on its body. She decided to investigate whether this strange “nude” phenotype had a genetic basis. She obtained some inbred carp that were pure-breeding for the wild-type scale pattern in which the fish had scales covering their body. She crosses these wild-type fish with her nude fish. To her surprise, the F1 progeny were wild-type fish and fish with a single, linear row of scales on the sides of their body (i.e. “linear). The ratio of these progeny was 2:1. She then crosses some of her F1 fish and obtains four phenotypes: wildtype, linear, nude and a new phenotype in which the fish had a few scales scattered over their body (i.e. “scattered”). The ratio of these offspring was 6:3:2:1. In the space below - answer the following questions: I REALLY NEED HELP TO UNDERSTAND THIS QUESHTION PLEASE EXPLAIN TO ME THE ASNWER AND SHOW EXAMPLES AND USE (use the letters S/s for scale production and L/l for scale pattern) in it I dont know how thank you (use the letters S/s for scale production and L/l for scale pattern) How many genes are involved in producing scales on these fish? - answer: _______________________________ What is going on genetically that explains all of these results?

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A student whose hobby is fishing pulled a carp out of Cayuga Lake that was very unusual: it had no scales on its body.

She decided to investigate whether this strange “nude” phenotype had a genetic basis. She obtained some inbred carp that were pure-breeding for the wild-type scale pattern in which the fish had scales covering their body.

She crosses these wild-type fish with her nude fish. To her surprise, the F1 progeny were wild-type fish and fish with a single, linear row of scales on the sides of their body (i.e. “linear). The ratio of these progeny was 2:1.

She then crosses some of her F1 fish and obtains four phenotypes: wildtype, linear, nude and a new phenotype in which the fish had a few scales scattered over their body (i.e. “scattered”). The ratio of these offspring was 6:3:2:1.

In the space below - answer the following questions:

I REALLY NEED HELP TO UNDERSTAND THIS QUESHTION
PLEASE EXPLAIN TO ME THE ASNWER AND SHOW EXAMPLES AND USE (use the letters S/s for scale production and L/l for scale pattern) in it I dont know how thank you

(use the letters S/s for scale production and L/l for scale pattern)

How many genes are involved in producing scales on these fish? - answer: _______________________________
What is going on genetically that explains all of these results?

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