DNA & Genetics
Terms
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- What is homozygous
- same two alleles Ex. BB
- what is a phenotype
- it is the phisicall appearance
- what is heterozygous
- an organism that has two different alleles for a trait
- what is a genotype
- genetic make-up of an organism for a trait
- what is Punnet Square
- a tool to predict offspring traits
- what is dominant
- a form of a trait that appears to to dominate or mask another form of the same trait
- what is a sex-linked gene
- an allele inherited on a sex chromosome
- what does recessive mean
- the form of a trait that seems to dissapear
- what is genes
- on the chromosome theat controlls the traits that are passed to offspring
- what is DNA
- Deoxidribonucleic Acid that is in the cells that stores information consists of strandswith molecules that control cell activities using coded instructions
- what are chromosomes
- thread like strands of DNA and protien in a cell nucleus that carry the code for cell charcteristics of an organism
- _____ is double spiral molecule with pairs of nitrogen bases
- DNA
- RNA differs from DNA in that it contains _____
- uracil
- a cell with 24 chromosomes some undergoes meiosis, the sex cells produced will each have ____ chromosomes
- 12
- name the five stages of mitosis
-
1)Interphase
2)Prophase
3)Metaphase
4)Anaphase
5)Telophase - name the stairs of DNA and name wich go together
-
1) Guanine
&
2) Cytosine
3) Thymine
&
4) Adenine
there also all made up of nitrogen bases - During _____ in mitosis, doublestranded chromosomes seperate
- anaphase
- Chromosomes are doubled during
- anaphase
- The chromosome number in cells after mitosis is _____ the parent cell
- the same as
- Budding fission and rgeneration are froms of _____
- asexual reproduction
- ______ is any permanent change ina gene or chromosome
- mutation
- Meiosis produces _____
- sex cells
- In the cell cycle most of th life of any cell is spent in ____
- interphase
- what is the differance between genes and chromosomes
- the difference between genes and chromosomes is that the genes controll the traits the are carryed to the offspring and the chromosome carrys the code for the organism
- what are the differance between offspring formed by sexual reproduction and asexual reproduction
- the differences between offspring formed by sexual reproduction and asexual reproduction is the number of chromosomes is inherited differently
- what do spindle fibers do during mitosis and meiosis
- the centromeres are attached to the spindle fibers
- in what cells do mitosis and meiosis take place
- in sexual reproduction cells
- why is more known about harmful mutations than benifcial ones
- benificial mutations are not known as well as harmful ones because some have no affect on the organism
- what does stand for RNA
- Ribonnucliec acid
- if one starnd of DNA had bases ordered ATCCGTC, what strand would be the bases of it's othere strand
- TAGGCAG
- _____ are located on chromosomes
- genes
- color blindness results from and allele that is ____
- on the x chromosome
- The major job of genes is
- to controll the traits