🏷️ LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION →
Log in
Biology
2
answers
0
watching
399
views
18 Oct 2018

Why is color-blindness more common among males than females?

Question 3 options:

Because women have better fashion sense

Because it is a dominant allele

Because they inherit it from their mothers

Because it is found on the y-chromosome and women do not have a y-chromosome

Because women have two x-chromosomes and two chances to get a "good" allele

Watch
2
answers
0
watching
399
views

For unlimited access to Homework Help, a Homework+ subscription is required.

10 Apr 2023

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Already have an account? Log in
Share

Related textbook solutions

Molecular Cell Biology
8 Edition,
Lodish
ISBN: 9781464183393
Biology: Science for Life with Physiology
6 Edition,
Belk
ISBN: 9780134555430
Biology
2nd Edition, 2013
Openstax
ISBN: 9781947172517
Concepts of Biology
OER Edition,
Openstax
ISBN: 9781938168116
Essentials of Biology
5 Edition,
Mader
ISBN: 9781259660269

Related questions

Complete the following paragraph to learn about x-linked inheritance. expressed, men, sex-linked, ... Question: Complete the following paragraph to learn about X-linked inheritance. expressed, men, sex-linked,... Complete the following paragraph to learn about X-linked inheritance. expressed, men, sex-linked, repressed, X, Y, autosomal, two, one Sex-linked alleles have a different pattern of inheritance compared to those found on ____________ chromosomes. This is because on ____________ alleles, the allele is only carried on the X chromosome and not the Y chromosome. That means that females can pass down diseased alleles to offspring through ____________ ____________ chromosomes, while males can pass down alleles through ____________ ____________ chromosome. For this reason, it is more likely that ____________ are afflicted with sex-linked diseases, because whatever allele is carried on their ____________ ____________ chromosome is ____________ .

Why are recessive X-linked traits seen more often in human malesthan in human females? (Select all that apply.)

Males have an X chromosome, but females do not.

Actually, X-linked traits are seen more often in females than inmales, because they have two X chromosomes.

Males don’t have a second X chromosome to mask the effects ofthe first one.

This phenomenon is due to X-inactivation.

While females would need two of these alleles to express therecessive phenotype, males only need one.

Sperm are more likely to carry an X chromosome than a Ychromosome.

We have discussed how recessive phenotypes are more likely to be expressed in males if the corresponding gene is found on the X-chromosome. For example, one-type of colorblindness is caused by a recessive X linked allele, and this trait is much more common inmales than females. But we have also discussed how, in placental mammals, one copy of each X chromosome is randomly silenced in female cells (X inactivation). This raisessomewhat of a paradox. Why don’t half of heterozygous females exhibit colorblindness just like hemizygous males that carry the recessive allele?

a.

Based on your under standing of Xinactivation in placental mammals, provide an explanation for why heterozygous females generally do not exhibit colorblindness despite the random silencing of one X chromosome.

b.How would your answer change if we were talking about a marsupial mammal (inwhich the paternally inherited copy of the X chromosome is inactivated in every cell)? Would you expect half of heterozygous females in a marsupial species toexhibit color blindness? Why or why not?

Weekly leaderboard

Home
Homework Help 3,900,000
Biology 460,000
Start filling in the gaps now
Log in