DNA Structure
what is the shape of the DNA molecule?
the DNA molecule has a double helix shape
what is a punnett square
a punnett square is a digram used in genetics to predict the possible genotypes of offspring from a particular cross
what is mutation
a mutation is a change in the DNA sequence of an organisms genome
what is meiosis
meiosis is a type of cell divison that reduces the chromosome number by half
how old is hayat
14
what are the four nitrogenous bases found in dna
the four nitrogenous bases are adenine thymine cytosine and guanine
what do the letters in a punnett square represent
the letters represent alleles of a gene for example "A" might represent a dominant
what are the main types of mutations
the main type of mutations include point mutations insertions deletions
what are the two main stages of meiosis
the two main stages of meiosis are meiosis l and meiosis ll
when is hayat birthday
hayats birthday is september 8 2010
what Is the backbone of the DNa molecule made of
the backbone of the DNA molecule is made of sugar deoxyribose and phosphate groups
what is a dominant allele
a dominant allele is one that expresses its Tait's even if only one copy is present
what is a point mutation
a point mutation is a change in a single nucleotide base pai in the DNA sequence
what is the significance of anaphase l in meiosis
in anaphase l homologous chromosomes are pulled dto opposite poles of the cell
what is hayat favorite food
what type of bond holds the nitrogenous bases together
hydrogen bonds hold the nitrogenous bases toghter
what is a recessive allele
homoxygous means having two different alleles for a particular gene
what is a missense mutation
a missense mutation is point mutation where a single nucleotide change results in the coding of a different amino
what happens during prophase l of meiosis
during prophase l homologous chromosomes pair up and exchange segments in a process called crossing over
who is hayat bestfriend
which nitrogenous bases pair together in DNA
adenine pairs with thymine and cytosine pairs with guanine
what does heterozygous mean
heterozygous means having two identical alleles for a particular
how can mutation be beneficial
mutations can be beneficial if they confer an advantage to the organism such as increased resistance
how does meisosis contribute to genetic diversity
meiosis contributes to genetic diversity through crossing over during prophase
how many siblings does hayat have