09.11.2022

i need help with the image attached please

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Biology
Step-by-step answer
P Answered by PhD

Unattached earlobes and cleft chin : 9

Unattached earlobes and no cleft : 3

Attached earlobes and cleft chin : 3

Attached earlobes and no cleft :1

Explanation:

Given -

Unattached earlobes are dominant to attached earlobes

Let the allele for attached ear lobe be represented by "l" and and unattached ear lobe be represented by "L"

Cleft chin is dominant to no cleft.

Let the allele for cleft chin be represented by "C" and no cleft chin be represented by "c"

Genotype of heterozygous parents

LlCc X LlCc

LC          Lc     lC         lc

LCLLCCLlCc     LlCCLlCc

LcLLCcLLcc    LlCcLlcc

lCLlCCLlCc    llCCllCc

lcLlCc         Llcc    llCcllcc

LLCC - 1

LlCc – 5

LlCC-2

LLCc – 1

LLcc-1  

Llcc -2

llCC-3

llcc-1

Unattached earlobes and cleft chin : 9

Unattached earlobes and no cleft : 3

Attached earlobes and cleft chin : 3

Attached earlobes and no cleft :1

Biology
Step-by-step answer
P Answered by PhD

Unattached earlobes and cleft chin : 9

Unattached earlobes and no cleft : 3

Attached earlobes and cleft chin : 3

Attached earlobes and no cleft :1

Explanation:

Given -

Unattached earlobes are dominant to attached earlobes

Let the allele for attached ear lobe be represented by "l" and and unattached ear lobe be represented by "L"

Cleft chin is dominant to no cleft.

Let the allele for cleft chin be represented by "C" and no cleft chin be represented by "c"

Genotype of heterozygous parents

LlCc X LlCc

LC          Lc     lC         lc

LCLLCCLlCc     LlCCLlCc

LcLLCcLLcc    LlCcLlcc

lCLlCCLlCc    llCCllCc

lcLlCc         Llcc    llCcllcc

LLCC - 1

LlCc – 5

LlCC-2

LLCc – 1

LLcc-1  

Llcc -2

llCC-3

llcc-1

Unattached earlobes and cleft chin : 9

Unattached earlobes and no cleft : 3

Attached earlobes and cleft chin : 3

Attached earlobes and no cleft :1

Biology
Step-by-step answer
P Answered by Master
Answer;

a)9:16 b)3:16 c)3:16 d)1:16

Explanation;

To complete the table;

EeAAEEAaEEaaeeAAeeaa

Unattached earlobes, will either be Ee (heterozygous) or ee (homozygous)

Cleft chin, will either be; AA (homozygous) or Aa (heterozygous)

Attached earlobes will be ee, while no cleft will be aa.

Therefore; the Unattached earlobes and cleft chin = 9/16

Unattached earlobes and no cleft = 3/16

Attached earlobes and no cleft = 3/16

Attached earlobes and no cleft = 1/16

Biology
Step-by-step answer
P Answered by Specialist

A. 100 percent Ee

Explanation:

The genotype of the parent who is homozygous for unattached earlobe would be EE.

The genotype for the parent who is homozygous for attached earlobe would be ee.

When a cross is made between these two then ,

EE X ee ---> Ee Ee Ee Ee

The 4 offsprings produced as a result of this cross will all have the genotype Ee.

Since E (unattached earlobe) is dominant over attached earlobe (e) the heterozygous Ee will have unattached earlobe.

Therefore, the genotypic ration would be 100% Ee.

See the attached punnet diagram for the cross.


Unattached earlobes is a dominant trait, e. a parent who is homozygous for unattached earlobes is cr
Biology
Step-by-step answer
P Answered by Master

100 percent Ee

Explanation:

This is a cross involving a single gene coding for attachment or not of earlobes. The allele for unattached earlobes (E) is dominant over the allele for attached earlobe (e). This means that allele E will always mask the phenotypic expression of e in a heterozygous state.

A parent that has same alleles for unattached earlobes i.e.  EE is crossed with a parent that has same alleles for attached earlobes i.e. ee. In this cross, all of the offsprings will have a heterozygous genotype, Ee because gametes E and e will be produced respectively by each parent.

Hence, since all of the offsprings will have an Ee genotype, it means 100% of their offsprings will have Ee (HETEROZYGOUS).


Unattached earlobes is a dominant trait, E. A parent who is homozygous for unattached earlobes is cr
Biology
Step-by-step answer
P Answered by Specialist
Homozygous: this means that the man has two genes for unattached earlobes, so whichever of these gene genes is transmitted  to the child, it will be unattached. Since having unattached earlobes is a result of a dominant gene, one such gene is enough and the child will definitely have an unattached earlobe.
Biology
Step-by-step answer
P Answered by Master
Homozygous: this means that the man has two genes for unattached earlobes, so whichever of these gene genes is transmitted  to the child, it will be unattached. Since having unattached earlobes is a result of a dominant gene, one such gene is enough and the child will definitely have an unattached earlobe.
Biology
Step-by-step answer
P Answered by PhD
Homozygous: this means that the man has two genes for unattached earlobes, so whichever of these gene genes is transmitted  to the child, it will be unattached. Since having unattached earlobes is a result of a dominant gene, one such gene is enough and the child will definitely have an unattached earlobe.

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