lecture 12 practice questions Flashcards
Cells that have only one set of chromosomes instead of two are called:
a. Diploid cells
b. Haploid cells
c. Gonads
d. Asexual
haploid cells
Which of the following is NOT true about sex cells?
a. Sex cells are also called Gametes
b. Sex cells can be produced only by Gonads
c. Female sex cells are called oocytes
d. Sex cells are diploid cells
e. Male sex cells are called spermatozoa
sex cells are diploid cells
Which of the following processes is NOT a part of Gametogenesis?
a. Meiosis
b. Differentiation
c. Maturation
d. Fertilization
fertilization
The union of 2 gametes of opposite sexes results in:
a. A zygote
b. A haploid cell
c. A new sex cell
d. A fetus
a zygote
Which of the following is NOT true about an embryo and a fetus?
a. Embryo is what a fertilized egg becomes, as it develops over 2
months
b. Embryo develops new organs
c. Once all the organs are formed, the embryo is called a fetus
d. Fetus continues forming new organs until birth
e. Offspring in womb from 8 weeks until 40 weeks of gestation is
referred to as fetus
fetus continues forming new organs until birth
Which of the following is NOT true about a zygote?
a. It has 46 chromosomes
b. It is considered a diploid cell
c. It begins dividing and multiplying many times
d. It develops into an embryo.
e. It has 1 set of chromosomes
it has 1 set of chromosomes
The separation of homologous chromosomes during Meiosis is called:
a. Crossing-over
b. Segregation
c. Separation
d. Meiosis II
segregation
Failure of homologous chromosomes to separate from each other is called:
a. Junction
b. Disjunction
c. Nondisjunction
d. Down syndrome
nondisjunction
Homologous chromosomes separate from each other during:
a. Meiosis I
b. Meiosis II
c. Differentiation
d. Fertilization
meiosis 1
Which of the following is NOT true about the consequences of
nondisjunction?
a. It may lead to trisonomy in offspring
b. It may lead to monosomy in offspring
c. It leads to an abnormal number of chromosomes in a gamete
d. It always results in Down syndrome
it always results in down syndrome
Homologous chromosomes are…
a. The chromosomes that come from two different parents, but contain
gene coding for the same traits
b. The chromosomes that come from two different parents, coding for
different traits
c. The chromosomes that come from the same person, coding for
different traits
d. None of the above
the chromosomes that come from two different parents, but contain gene coding from the same traits
Which of the following is NOT true about Down syndrome?
a. It is a condition where there is an abnormal number of chromosomes
b. This is a trisonomy of chromosome #21
c. Down syndrome pregnancies are more likely in women over 40 years
of age than in younger women
d. It results from missing certain genes from the genetic library
it results from missing certain genes from the genetic library
Which of the following chromosomal pairs are considered the sex
chromosomes?
a. Pair #1
b. Pair #7
c. Pair #21
d. Pair #22
e. Pair #23
pair #23
Which of the following is NOT true about the sex chromosomes?
a. They are never homologous
b. The X chromosome contains regular genes, coding for many important
functions, regardless of sex/gender
c. The Y chromosome contains gene coding for maleness
d. Without the Y chromosome, the embryo would develop into a female
e. The default setting for embryonal development is set for femaleness,
unless the Y chromosome is present.
they are never homologous
The X-linked genetic disorders
a. Are caused by mutant genes found on X chromosome #23
b. Are caused by extra chromosome X
c. Are caused by lack of genes on the Y chromosome
d. Are caused by missing genes on the X chromosome
are caused by mutant genes found on x chromosome #23
