Sex Determination and Sex-Linked Inheritance
1. How is the genetic
determination of sex
established in humans?
2. What are the homologous
and the heterologous portions
of the human sex
chromosomes?
3. Concerning the sex
chromosomes of the XY
system which type of gamete
do the male and the female
individuals respectively
produce?
4. Is itpossiblethat an X
chromosomeof a woman can
havecome from her father?
5. Is it more indicated for a
geneticist desiring to map the
X chromosome of them other
of a given family (the
researcher does not have
access to her DNA, only access
to the genetic material of the
offspring) to analyze the
chromosomes of her
daughters or of her sons?
6. Do the genes of the X and Y
chromosomes determine only
sex characteristics?
7. What are the main diseases
caused by errors of the
number of sex chromosomes
in the cells of an individual?
8. What is the in activation of
the X chromosome? What is a
Barr body?
9. Besides the XY system are
there other sex determination
systems?
10. What are X-linked traits?
11. How many alleles of genes
that condition X-linked traits
do female and male
individuals respectively
present?
12. What is the clinical
deficiency presented by
hemophilic people? What is
the genetic cause of that
deficiency?
13. What are all possibilities
of genotypes and phenotypes
formed in the combination of
alleles responsible for the
production of factor VIII?
14. Why is it rare to find
hemophilic women?
15. Is it possible for any son
of a couple formed by a
hemophilic man (XhY) and a
nonhemophilic noncarrier
(XX) woman to be hemophilic?
16. What is the clinical
manifestation of the disease
known as daltonism?
17. What is the type of genetic
inheritance of daltonism? Is
daltonism more frequent in
men or in women? What is the
physiological explanation for
the daltonism?
18. Are sex-linked diseases
associated only to genes of
the X chromosome?
19. What are holandric genes?
20. What is sex-influenced
dominance?