Studied by 3 peoplewho is the father of genetics
Gregor Mendel
What was Gregor Mendel’s Pea Plant experiment.
He tried to figure out how genetics are passed between parents to their offspring, using short and tall pea plants to see what trait the pea plant would get.
How did Mendel control which plants were fertilized
he pollenated them by hand.
Write a genotype for a homozygous Dominant D genotype
DD
Write a genotype for a homozygous Recessive R.
rr
Write a genotype for a heterozygous Dominant D
Dd
What is a synonym for hybrid
heterozygous
write a hybrid genotype with R
Rr
What is a synonym for true breeding or purebred.
homozygous
Write a dominant purebred genotype for R
RR
Write a recessive pure bred genotype for R
rr
what is the definition of allele
one or more forms of a gene
what is the principle of dominance
some alleles are dominant, some are recessive
definition for genotype
genetic makeup of an organism
definition for phenotype
physically appearance
what is the principle of independent assortment
genes for traits separate
definition for homozygous
identical alleles
definition for heterozygous
different alleles
what does mitosis produce
produces body cells and diploid cells
what does meiosis produce
produces sex cells and haploid cells
what is incomplete dominance
blending of traits
what is codominance
both alleles are dominant.
What is the genotype for a cross between a heterozygous dominant purple (P) plant and a recessive white (p) plant?
Pp and pp
What is the phenotype percentage for a cross between a heterozygous dominant purple (P) plant and a recessive white (p) plant?
50% purple and 50% white
what does meiosis produce?
gametes
what are gametes
egg or sperm
how many chromosomes do a human have
23
if the haploid number is ten, than what is the diploid number
20
what is the major different between mitosis and meiosis?
Mitosis creates 2 identical nuclei whereas meiosis creates 4 nuclei with half the original nuclei.
what crosses over during meiosis
chromosomes
why are chromosomes crossing over important
it creates genetic diversity
how many squares are in a dihbyrid cross table?
16
how many phenotypes can be in a dihybrid cross
4
Coat color in mice is incompletely dominant. Yellow (Y) and white (y)-colored mice are homozygous, while cream(Yy)-colored mice are heterozygous. If two cream-colored mice mate, what phenotypic ratio can we expect of their offspring
25% Yellow, 25% White 50% Cream
What is the genotype for black chickens when the allele for black is B and the allele for white is W but black and white is BW
BB
What is the genotype for white chickens when the allele for black is B and the allele for white is W but black and white is BW
WW
What would happen when 2 black and white spotted chickens (BW) were cross? What is the probability in percentage of black, white and black and white chickens?
black chickens is 25%, white chickens is 25%, black and white chickens is 50%
Note
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