In cats, black fur colour is caused by an X-linked allele: the other allele at this locus causes orange colour.. the heterozygote is tortoiseshell. what kinds of offring would you expect from the cross of a black female and an orange male?A) tortoiseshell female; tortoiseshell maleB) black female;orange maleC)orange female; orange maleD)tortoiseshell female; black maleE)orange female; black male

D tortoiseshell female; black male

Explanation:

Let the allele for black fur color be B, the alternate version (orange color) will be b while a Bb will appear tortoise shell in color.

Black female =

Orange male =

Crossing a black female with an orange male:

  x  

Offspring

  tortoise shell female

    black male

  tortoise shell female

     black male.

All the females from the cross will be tortoise shell in appearance while all the males will be black.

The correct option is D.

The kind of offspring to expect will be tortoiseshell female and black male.

Explanation:

X linked alleles are normally passed from mother to sons and fathers to daughters.

In cats, black fur colour is caused by an X-linked allele: the other allele at this locus causes orange colour. the heterozygote is tortoiseshell.

Both the black fur colour and the orange fur colour will be inherited in the homozygous dominant form. Thus, we have:

Black female:    XBXB     Black male: XBY

orange female: XRXR    orange male: XRY

The heterozygote: XBXR (female). No heterozygote male as the males only possess one X chromosomes. so they are either black or orange.

A cross between black female and an orange male gives:

           XB            XB

XR      XBXR      XBXR

Y        XBY        XBY

The kind of offspring to expect will be tortoiseshell female (an heterozygote) and black male.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.