7 An individual heterozygous for a trait and an individual homozygous recessive for the trait are crossed and produce many offspring that are
all the same genotype.
all the same phenotype.
of two different phenotypes.
of three different phenotypes.
9 What do we call a diagram showing several generations of a family and the occurrence of certain genetic characteristics?
Punnett square.
monohybrid cross.
pedigree.
family karyotype.
10 Most of the time, genetic characters are inherited by more complex patterns of heredity including all of the following, EXCEPT
solitary alleles.
incomplete dominance.
codominance.
polygenic inheritance.
2007-11-20 06:29:22 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Botany
I'm guessing you're not dumb, but you do need to read your book and figure out the answers for these questions. They're not that bad at all.
For the first one, set up a Punnett square and work out what they can produce.
You should be able to find the answers to the others fairly easily.
2007-11-20 06:37:32 · answer #1 · answered by hcbiochem 7 · 1⤊ 0⤋
If the trait is heterozygous it is two different alleles for the gene but if it is homozygous they are the same alleles for the gene. (Typically the capital letter designates dominance while the lower case is used for the recessive.)
Gg heterozygous so produces two possible gametes G or g
GG or gg homozygous, each produces only one gamete
#7 In cases of true dominant/recessive alleles
so this case is Gg x gg => Gg & gg
This 1:1 ratio is true for both the genotype and the phenotype whenever the cross is heterozygous by homozygous recessive. (This can also be used to test for heterozygosity by breeding a known pure recessive with an unknown genotype to see if the offspring show one or two phenotypes.)
#9 This is a pedigree showing the crosses for several generations.
#10 Solitary
2007-11-20 15:23:59 · answer #2 · answered by gardengallivant 7 · 1⤊ 0⤋