IB Bio HL Topic 3 Review

Which of the following is the cause of sickle-cell anemia?

• Tryptophan is replaced by leucine
• Leucine is replaced by valine
• Glutamic acid is replaced by valine
• Lysine is replaced by glutamic acid

Tags

NGSS.HS-LS3-2

NGSS.HS-LS1-1

Which of the following statements about homologous chromosomes is correct?

• Each gene is at the same locus on both chromosomes
• They are two identical copies of a parent chromosome which are attached to one another at the centromere
• They always produce identical phenotypes
• They are chromosomes that have identical genes and alleles

What happens in crossing over?

• Exchange of genes during metaphase of mitosis
• Random distribution of chromosomes during meiosis
• Exchange of genetic material between homologous chromosomes
• Homologous chromosomes fail to separate during meiosis

What can be concluded from the karyotype  provided below?

• There was non-disjunction during meiosis in the mother.
• There was non-disjunction during meiosis in the father.
• The fetus is male.
• The fetus is female.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

A cell in the testis of a male chimpanzee contains 2n=48 chromosomes.  It then undergoes meiosis.  How many molecules of DNA will be present in the nucleus of the sperm cells just after meiosis?

• 96
• 48
• 24
• 12

If the haploid number of a species is 14, how many chromatids will there be in metaphase I in a dividing diploid cell?

• 7
• 14
• 28
• 56

How many autosomes are there in a human sperm?

• 1
• 22
• 23
• 46

Which phase of cell division is photographed in order to make a karyotype?

• Anaphase of mitosis
• Anaphase I of meiosis
• Metaphase of mitosis
• Metaphase II of meiosis

What does the karyotype below correspond to?

• A normal male
• A normal female
• A female with Down Syndrome
• A male with Down Syndrome

Tags

NGSS.HS-LS3-2

If the amount of DNA in a haploid gamete is represented by X, what is the net quantity of DNA in a cell from the same organism at the start of meiosis?

• 0.5x
• x
• 2x
• 4x

Tags

NGSS.HS-LS3-2