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blsea [12.9K]
3 years ago
7

In mice with black agouti coats, each hair is black and yellow. Two mice with black agouti coats are crossed. Among the offsprin

g, most of the mice have black agouti coats, and the rest of the mice have nonagouti coats with solid black hairs.Based on the results of the cross, which of the following statements describes the most likely genetics of the coat color in the mice?
A The agouti allele is recessive to the nonagouti allele.
B The agouti allele is dominant to the nonagouti allele.
C The agouti allele and nonagouti allele are sexlinked.
D The agouti allele and nonagouti allele are codominant.
Biology
1 answer:
sertanlavr [38]3 years ago
8 0
<span>A, the agouti allele is recessive to the nonagouti allele. Since both of the sex partners had the black agouti coats then if the gene had been dominant the black agouti coats should have been across all of the offpsring. But it seems that over time it could slowly deteriorate.</span>
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The very rare Bombay blood phenotype in humans results in blood type O because of the lack of both the A and B antigens in indiv
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The probability that the child will have type blood B equals <u>3/16</u>.

Explanation:

<u>Available data:</u>

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Cross: IAIB Hh    x    IAIB Hh

Gametes) IAH, IAh, IBH, IBh  

                IAH, IAh, IBH, IBh

Punnett square)        IAH            IAh         IBH         IBh

                   IAH      IAIAHH     IAIAHh    IAIBHH   IAIBHh

                   IAh       IAIAHh     IAIAhh     IAIBHh    IAIBhh

                   IBH      IAIBHH     IAIBHh     IBIBHH   IBIBHh

                   IBh       IAIBHh     IAIBhh      IBIBHh   IBIBhh

F1) Genotype

  •     1/16 IAIA HH
  •     2/16 IAIAHh
  •     1/16 IAIAhh
  •     2/16 IAIBHH
  •     4/16 IAIBHh
  •     2/16 IAIBhh
  •     1/16 IBIBHH
  •     2/16 IBIBHh
  •     1/16 IBIBhh

    Phenotype

  •     3/16 Blood type A
  •     6/16 Blood type AB
  •     3/16 Blood type B
  •     3/16 Blood type 0  
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Somatic cells are produced through the cell division process of mitosis. ... Cells with two copies of each chromosome are called diploid. Sperm and egg cells, called gametes, are formed through meiosis, which is a slightly different cell division process that results in the cells having only one copy of each chromosome.

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