Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
biology ocr b1
you and your genes
| Term | Definition |
|---|---|
| where are chromosomes found within a cell? | nucleus |
| what do genes code for? | proteins |
| is a persons weight determined by genes, the environment or a combination of both? | they are determined by both environment and genes |
| name two types of sex cells? | sperm (male), egg (female) |
| true or false - in human body cells , chromosomes are found in pairs? | true , chromosomes in the human body do come in pairs |
| true or false - in human sex cells , chromosomes are found in pairs? | false, sex cells only contain one chromosome in each pair |
| what are alleles? | they are different forms of a gene. They can be dominant or recessive. |
| why do children look both like there parents? | because they half the alleles from each parent |
| what sex chromosomes do human males have? | XY |
| is the allele for cystic fibrosis dominant or recessive? | recessive |
| what are the symptoms for cystic fibrosis? | difficulty breathing, chest infections, difficulty in digesting food |
| what are the symptoms for Huntington's disease? | late onset, tremor ,clumsiness,memory loss,inability to concentrate,mood changes |
| other than testing embryos during IVF , give one other use of genetic testing? | can check for genetic disorders |
| what is the definition of a clone? | genetically identical organisms |
| how are identical twins formed? | a single egg will split into 2 and then 2 separate embryos start to develop |
| what are stem cells? | UN-specialized cell, they can become anything |
| what are the differences between two main types of stem cells? | the two types are embryonic and adult, the main difference is that adult can only turn into some types of cells where as the embryonic stem cell can turn into any type of cell |
| describe one way that stem cells could be used to treat an illness? | people with blood disease can get a bone marrow transplant, bone marrow contains stem cells to replace the faulty |
| what is a functional protein? | enzymes such as the nuclei of the cells |
| what is a structural protein? | collagen |
| what type of characteristics is determined by just genes? | dimples |
| what type of characteristics are determined by the environment? | scars |
| some characteristics are determined by several genes working together such as? | eye colour |
| how many alleles do you usually have for each gene? | 2 |
| what is homozygous? | two alleles from the same gene |
| what is heterozygous? | two alleles from different genes |
| alleles can be...? | recessive and dominant |
| what happens if an individual has one or both the dominant alleles | he WILL show the associated dominant characteristics |
| what happens if an individual has one recessive allele | he will NOT show the recessive allele characteristics |
| what happens if an individual has both the recessive alleles? | he WILL show the recessive allele characteristics |
| what chromosome is sex determined on? | the Y chromosomes triggers the development of testes, in the absence of the Y chromosome ovaries will develop |
| what is a genotype? | a genotype describes the genetic makeup of an organism |
| what is a phenotype | describes the observable characteristics that the organism has |
| is the allele for Huntingtons recessive or dominant? | dominant |
| what can a person with a recessive allele do | carry it on to his/her offspring |
| what are the uses for genetic testing for screening adults,children and embryos | testing embryos for embryo selection (pre implantation) predictive genetic diseases testing an individual before prescribing drugs |
| what are the problems with testing adults and fetuses for alleles that causes genetic disorders | risk of miss carriage as a result of cell sampling, the result may not be accurate, including false positives and false negatives,whether to have a child or not whether the pregnancy should be terminated whether other family member should be informed |
| how can there be differences between identical clones | environmental changes like scars |
| how do plants produce clones? | when they produce clones with either bulbs or runners |
| how can you artificially make a clone? | you take the nucleus from an adult body cell and transfer it to an empty unfertilized egg cell |
Created by:
jack rowlands
Popular Biology sets