Login | Register
Enrol now for our new online tutoring program. Learn from the best tutors. Get amazing results. Learn more.

Welcome, Guest. Please login or register.

December 06, 2021, 07:44:02 am

Author Topic: Question about Dihybrid Cross, Crossing Over and Phenotypic Ratio  (Read 465 times)  Share 

0 Members and 1 Guest are viewing this topic.

sam777

  • Adventurer
  • *
  • Posts: 10
  • Respect: 0
Hi,

Could someone please explain question 21 from the attached image?

Thanks!

VCEStudent2034

  • Forum Regular
  • **
  • Posts: 96
  • ‘Believe you can and you’re halfway there.’ - T.R.
  • Respect: +1
Re: Question about Dihybrid Cross, Crossing Over and Phenotypic Ratio
« Reply #1 on: October 16, 2021, 05:49:27 pm »
0
Hi,

Could someone please explain question 21 from the attached image?

Thanks!
Hi sam777!

I’m only in year 11, but I just learnt about linked and unlinked genes recently.

I’d be guessing that the answer is D), since linked genes are usually inherited together and the likelihood of crossing over (and, therefore, recombinants) is lower. Two of the ratios should be ‘1’, because that would be the (original) phenotypes of the parents. The other two possibility would have a ratio of less than 1, since the likelihood of recombinants is extremely low.

I hope this helped!
Class of 2022 (VCE)

2021: Maths Methods

2022: English, Biology, Chemistry, Physics, Specialist Maths

RAW Study Score Goals: 48+

Target ATAR: 99+