1/20 & 1/21 - 7 th grade agenda collect hw: reading & notetaking p. 101 – 104 & signed...
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1/20 & 1/21 - 7th Grade Agenda
Collect HW: Reading & Notetaking p. 101 – 104 & Signed Grade PrintoutLast Day to turn in late work for the SemesterLate Science Faire Background PresentationsGenetic Traits ActivityHuman TraitsMicro Viewer Lab (Central Nervous System)Video: BBC (Challenges of Life)Text Book Reading: 199 – 203HW: Reading & Notetaking p. 105 - 108Reminder Procedure, Data Table, Graph & Results due 2/9 & 2/10 (15 Points)
Reflection
• Prompt: Write 2 differences between DNA and RNA
Some human traits are controlled by a single gene that
has more than two alleles
• Blood type is controlled by three Alleles
• What are the major human blood types?
• A, B, AB & O• Which human blood type
is a universal donor?• Blood Type: O
Many human traits are controlled by many genes
• Four genes control height in humans• Skin, eye and hair color are controlled by
multiple genes
What are the Female Sex Chromosomes?
• XX
What are the Male Sex Chromosomes?
• XY• Because there is
some missing genetic information in the “Y” chromosomes, Males are more likely to get a sex-linked trait
Who determines whether the child is a boy or a girl ?
• Father
How many pairs of chromosomes to humans have?
• 23
Sex Linked Genes
• Genes on the X and Y chromosomes are called sex linked genes
• Most of the genes on the X chromosomes are not on the Y chromosomes
• Since Males have the Y chromosomes they are missing an allele.
Red – Green colorblindness• More males have red – green color blindness then females• Why?
Red – Green colorblindness
Red – Green colorblindness
Genetic Disorders – Cystic Fibrosis
• Cystic Fibrosis is a disorder in which the body produces abnormally thick mucus in the lun___ and intes_____.
• The thick mucus fills the lungs making it hard for the affect person to breathe.
gstines
Genetic Disorders – Sickle Cell Disease
• Sickle shaped red blood cells clog blood vessels and cannot carry as much ox_____ as normal cells.
ygen
Genetic Disorders – Hemophilia
• People with Hemophilia do not produce one of the prot_____ needed for normal clotting.
• They can die from simple cuts and bruises
ein
Genetic Disorders – Down Syndrome
• In Down syndrome, a person’s cells have an extra copy of chrom______ 21
• People with Down syndrome have some degree of mental retar________
osome
dation
Reflection
• Prompt: Write 3 facts you learned from the video