bio quizz
what is a ALLELE
yes
a a form of gene that is that is dominant or recessive
what is a homologous pair
a pair with the same shape,size,length,same genes but diffrent alleles
what does meiosis create
4 haploid cells
what is a gene
a certain physical peice of dna that will code for anspecific protein
what is a chromosome?
A piece of DNA and a associated protein
what's a synaptic Pear/tetrad
it's a process in meiosis where homologous chromosomes pair up
what is a dominant allele?
A allele that will be expressed in a homozygous or heterozygous condition
what is a recessive allele?
Elias that can be only expressed in the homozygous condition
what is a genotype?
The genetic makeup of a cell or organism (combination of alleles)
what is a phenotype?
phenotype is how the genotype is expressed example physical characteristics of a organism
what is a homozygous condition?
two of the same alleles for one gene RR OR rr
what is a heterozygous condition?
two different alleles for the same genes Rr or Aa
what does a ratio tell you?
The proportion of one thing to another
what does a frequency tell you?
The portion of one thing to a total
and animals where does meiosis occur?
meiosis will occur within diploid reproductive organs, called ovaries for females and testes for male
what is a mono hybrid cross?
is a cross between two organisms, the difference with one characteristic
what does it mean when all of the offspring more purple?
it means there was a dominant homozygous parent
what was Mendel second law?
alleles with different genes assort independently of one another during the gamete formation
what does it mean when genes are close together?
when they're closer together, they have a lower chance of recombinant because the frequency is very close to zero
what condition only has one sex chromosome?
Turner syndrome
what are some of the phenotypic abnormalities of turner syndrome
there would be short stature, a webbing neck, mental challenges, rudimentary ovaries and no menstruation in females
what condition has an extra chromosome?
down syndrome
what are some of the phenotypic abnormalities associated with down syndrome?
they will have distinct facial features,lower set eyes, a protruding tongue, shorter statue, and they also will have heart problems
with Klinefelter syndrome what chromosome is there extra?
there is a extra X chromosome