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umka21 [38]
3 years ago
9

if a homozygous dominant parent and a heterozygous parent are crossed, what percentage of the offspring are expected to heterozy

gous
Biology
1 answer:
denis-greek [22]3 years ago
4 0
50%

You create a punnet square.
Here is a good punnet square calculator

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You cross two fruit trees. one tree produces lemons with spiky leaves and bumpy fruit. the other produces lemons with smooth lea
Triss [41]

the alleles are as follows;

L - lemons with bumpy fruit (dominant)

l - lemons with smooth fruit (recessive)

S - smooth leaf (dominant)

s - spiky leaf (recessive)

parents

one tree - lemons with smooth leaves and smooth fruits

<span>one tree - lemons with spiky leaves and bumpy fruits </span>

if parents show recessive phenotype , this means that the genotype should be recessive homozygous - ll / ss

if parents show dominant phenotype genotype is dominant homozygous or heterozygous

<span>parents    -                 S_ ll           x          ssL_</span>

<span>f1generation-</span>

<span> bumpy fruits with smooth leaves - SsLl </span>

<span>bumpy fruits with spiky leaves - </span>ssLl

<span>since offspring are bumpy fruits it should either be Ll /LL, but one parent is ll therefore for the offspring to be Ll/ll the other parent should have homozygous LL. Then the offspring will be heterozygous for fruits</span>

<span>offspring have both spiky leaves - ss and smooth leaves Ss. for offspring to have heterozygous and homozygous both, since one parent is already homozygous, the other parent should have heterozygous alleles- Ss</span>

<span>the parents genotypes are Ssll and ssLL  </span>

<span>             </span>
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