× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
t
7
m
6
k
6
F
5
j
5
t
5
j
5
G
5
f
5
a
5
d
5
c
5
New Topic  
llaalllaallaaaa llaalllaallaaaa
wrote...
Posts: 53
Rep: 1 0
5 years ago
In birds, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). Since female birds have only one Z chromosome, they have only one copy of all Z-linked genes and they express the phenotype of the allele that they get.

Barred is a sex-linked dominant trait in chickens. The barring allele causes white pigment in bars on a solid color producing an alternating pattern. The original solid color in the chickens below is black.

The possible genotypes and their corresponding phenotypes are as follows:

Genotype   Gender   Feather
Phenotype
ZBZB
Male   Barred
ZBZb   Male   Barred
ZbZb   Male   Black
ZBW   Female   Barred
ZbW   Female   Black

Which of the following rows correctly displays the phenotypes of the F1 generation of a cross between a pure breeding barred rooster and a black hen AND a black rooster and a barred hen, respectively?
Select one:
a.
Barred Male cross times Black Female
Black Male cross times Barred Female
100% barred
2 barred females : 1 barred male : 1 black male
 b.
Barred Male cross times Black Female
Black Male cross times Barred Female
100% barred
100% barred
 c.
Barred Male cross times Black Female
Black Male cross times Barred Female
100% barred
Barred males and black females
 d.
Barred Male cross times Black Female
Black Male cross times Barred Female
Barred males and black females
100% barred
Read 164 times
2 Replies
Replies
wrote...
Educator
5 years ago
Does this topic help?

https://biology-forums.com/index.php?topic=1815667.0
wrote...
5 years ago
Yes it does thank you!
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  987 People Browsing
Gallery
  
 308
  
 560
  
 208
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 820