1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vadim26 [7]
3 years ago
9

Women with Turner syndrome (XO) and normal women (XX) are clearly different phenotypically. In addition, the vast majority of XO

conceptions abort before birth. However, both XO and XX women have one active X chromosome since the X in XO women remains active and one might expect that they would therefore have similar phenotypes.
What is the most reasonable explanation for their different phenotypes?
a.) XO women do not have a copy of the SRY gene.
b.) XO women have problems during development because mitosis is abnormal.
c.) In XO women, the single X chromosome has no partner to pair with during mitosis so that each cell division is delayed by pairing problems with the single X not finding a pairing partner.
d.) XO women are missing a copy of the Xist gene so that they are forced to develop partway along the male pathway during embryogenesis.
e.) Some genes remain active on the inactive X chromosome and XX women will have two copies of these genes expressed and XO women only one copy.
Biology
1 answer:
Travka [436]3 years ago
6 0

Answer:

E

Explanation:

Turner syndrome females have a phenotype because there are regions of the X chromosome that normally escape inactivation, allowing 2 copies of the gene to be expressed. These regions are called pseudoautosomal regions.

These are inherited in a typically autosomal fashion, permitting crossing over between the X and Y.  In Turner syndrome, the lack of second X chromosome means these genes are missing and the phenotypes result from haploinsufficiency

You might be interested in
Of what mineral or minerals is the sandstone made
nlexa [21]
<span>Most sandstone is composed of quartz or feldspar </span>
5 0
3 years ago
Read 2 more answers
Please help!!! <br><br> What common items are PCR and restriction enzymes similar to?
IceJOKER [234]
Restriction enzymes can also be used to generate compatible ends on PCR products. In all cases, one or more restriction enzymes are used to digest the DNA resulting in either non-directional or directional insertion into the compatible plasmid. The most common Type II enzymes are those like HhaI (NEB #R0139), HindIII (NEB #R0104), and NotI (NEB #R0189)
6 0
3 years ago
Which organisms externally digest dead organic matter and then absorb the nutrients?
S_A_V [24]
A. community and abiotic environment
6 0
3 years ago
What causes cell differentiation during an organism's development?
storchak [24]
The specialization of cell in its broad sense,growth also include the phase of cell development
8 0
3 years ago
______Strands of DNA containing directions for making protein
murzikaleks [220]

Answer:

Each DNA sequence that contains instructions to make a protein is known as a gene. 

8 0
3 years ago
Other questions:
  • A disease of the blood characterized by overproduction of leukocytes is called
    7·1 answer
  • Which statement best describes the scientific laws?
    14·2 answers
  • Which piece of children’s playground equipment could be used to model and explain the movement of matter in the biosphere?
    7·1 answer
  • What happen during reconstruction phase of wound healing ?
    10·1 answer
  • gray seed color in peas is dominant to white. assume that mendel conducted a series of experiments where plants with gray seeds
    15·1 answer
  • Match the function to the correct part of the neuron.
    7·2 answers
  • In eukaryotes, gene regulation occurs at the level of transcription with the help of certain regulatory proteins. Which proteins
    11·2 answers
  • QUESTION 2 The parts of the scientific method have to be followed in one specific order in all investigations. True False
    5·1 answer
  • The starting molecule for glycolysis is
    11·1 answer
  • If there is an increase in stimulation by the sympathetic nervous system
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!