Top Posters
Since Sunday
25
13
o
9
j
7
s
7
R
7
e
6
6
b
6
f
6
s
6
j
5
This topic contains 1 attachment.
Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
New Topic  
Anonymous sara5656
wrote...
Go to Answer
A month ago
1) Polydactyly is a rare human trait that causes an individual to have six digits (fingers or toes). An autosomal dominant gene causes the extra digit to develop.

Choose the correct genotypes of all individuals in this pedigree chart.

I-1 is
Answer
 

I-2 is
Answer
 

II-1 is
Answer
 
II-2 is
Answer
 
II-3 is
Answer
 
II-4 is
Answer
 
II-5 is
Answer
 
III-1 is
Answer
 
III-2 is
Answer
 
III-3 is
Answer
 
III-4 is
Answer
 

III-5 is
Answer
 
III-6 is
Answer
 

Individuals III-1 and III-2 are Answer twins.
Attached file
Thumbnail(s):
You must login or register to gain access to this attachment.
Read 159 times
4 Replies
Replies
Anonymous
wrote...
#1
A month ago
Can you check if the answer provided by this tutor helps?

https://biology-forums.com/index.php?topic=2035623.0

If not, please reply back and I'll try something else
Anonymous
wrote...
#2
A month ago
It’s confusing can you help me out please
Answer verified by a subject expert
Anonymousbio_man
wrote...
#3
A month ago
Sign in or Sign up in seconds to unlock everything for free
The pedigree is showing the autosomal dominant trait. Because there are not found skipping of trait from one generation to another. If the parent has trait, then it will pass trait to atleast some of the offspring.

The normal individuals have pp genotype.

The affected individuals have either PP or Pp genotype.

If mating between normal and affected occurs, and progenies are affected, then affected parent and affected offspring have Pp genotype. whereas normal parent and affected parent have pp genotypes.

That's why, the following genotypes are found:

I-1: Pp

I-2: pp

II-1:pp

II-2: Pp

II-3: pp

II-4: Pp

II-5: pp

III- 1: pp

III-2: Pp

III-3: pp

III-4: pp

III-5: Pp

III-6: Pp

III-1 and III-2 are fraternal twins. Because there are found different genotype. This suggests that they are produced from different zygotes.
This verified answer contains over 170 words.

Related Topics

Anonymous Author
wrote...
#4
A month ago
thanks
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  237 People Browsing
 394 Signed Up Today
Start New Topic Take the Tour Study Tips Study ToolsNew Topics Trending Browse by Textbook
Related Images
  
 2201
  
 11
  
 9
Your Opinion
Previous poll results: Should Ph.D.'s be addressed as doctors?