5 Written questions
5 Matching questions
- What causes secondary sex characteristics in males and females? What secondary sex characteristics do males and females show?
- Why is gene expression controlled?
- Chapter 14
- What is reproduction? What are the two main types? Explain each.
- What are homologous chromosomes?
- a Chromosomes that are similar in shape, size and kind of chromosomes they carry.
- b Controlled so that genes are only expressed when needed
Saves energy and resources for the cell
Can be triggered by environment of the cell
Contact with other cells
The age of the cell
- c ...
- d The making of more of the same species.
The two main types are sexual and asexual reproduction.
Sexual- genetic material is donated from two parents to make a genetically unique offspring.
Asexual- genetic material is donated from one parent to make a genetically identical offspring.
- e Males: testosterone / Secondary traits:
increase in height, longer and heavier bones, broader shoulders, thicker and tougher skin, deepened voice, facial hair, pubic hair, body hair, enlarged penis, scrotum, testes and formation of sperm
Females: estrogen / Secondary traits:
weight gain in breast, hips and buttocks, increase height, widening of hip, softer and smoother skin, growth of pubic hair and underarm hair, increase in breast size, enlargement of external genitalia, formation of ova, beginning of menstruation
5 Multiple choice questions
- Prokaryotes are simpler and uses operons which are groups of genes with closely related functions that respond to environmental demands of the prokaryotic cell
Eukaryotic gene regulation is more complex and can happen before transcription, after transcription or after translation
- Crossing over- homologous chromosomes exchange genetic material during the 1st phase of meiosis
Law of segregation- the random chance that the gamete will receive either allele
Law of independent assortment- during meiosis each allele for each gene separate independently from one another
- 1) They have very contrasting traits
2) Can both self-pollinate and cross pollinate
3) Easy to grow
- Genotypic ratio- 1:2:1
Phenotypic ratio- 3:1
75% chance the dominant trait will be expressed
5 True/False questions
How does the number of chromosomes in a human gamete vs. a human somatic cell? → deletion- occurs when a piece of chromosome is lost
duplication-occurs when a piece remains attached to its homologous chromosome after meiosis
inversion- occurs when a piece reattaches to its original chromosome but in the reverse direction
translocation- occurs when a chromosome piece breaks off and reattaches to a completely different non homologous chromosome
What is TSS? What are some of the first symptoms? → TSS is toxic shock syndroms.(Is a severe illness that results when vaginal bacteria secret toxins that get into the blood stream)
Some of the fist symptoms are flu like symptoms including vomiting, dizziness and fever.
Why are inhalants usually the first drug used? → They are easily accessible
What was Dawrin's role in developing evolutionary theory? → The sequence of amino acids.
What are the types of chromosomal mutation? Describe each? → Point mutation- caused by change of a single nucleotide (usually silent mutation)
Insertion or Deletion- caused by addition or subtraction of one or more nucleotides in a sequence (frameshift mutation)
Silent mutation- caused by change in a nucleotide of a gene but that change has no effect on the protein produced (usually point mutation)
Missense mutation- results when a codon is changed and causes a different amino acid to be put into the protein (replacement mutation)
Frameshift mutation- caused by addition or deletion of nucleotides (insertion or deletion)
Nonsense mutation- results when a codon for an amino acid if changed to a stop codon
-amino acids usually cut short