Loading

Module 1: Dominancia incompleta de (parcial)

Apuntes
Study Reminders
Support
Text Version

Set your study reminders

We will email you at these times to remind you to study.
  • Monday

    -

    7am

    +

    Tuesday

    -

    7am

    +

    Wednesday

    -

    7am

    +

    Thursday

    -

    7am

    +

    Friday

    -

    7am

    +

    Saturday

    -

    7am

    +

    Sunday

    -

    7am

    +

XSIQ
*

Biology - Lethal Example

Lethal example

If a pair of yellow-haired mice is mated, the ratio of particular coat
colours in the offspring are always the same. 2/3 are yellow, 1/3 is grey,
that is, a ratio of 2:1. Why not 3:1?

The phenotype yellow is dominant to grey.

_Let Y denote allele for yellow coat_

_Let y denote allele for grey coat_

* When the female parent was examined 1/4 of the offspring were found
dead in the uterus.

* In repeated crossings of yellow with yellow, grey and yellow offspring
are always produced. This must mean that the yellow mice are heterozygous
[1] for the allele.

Previous | Next

Links:
------
[1] http://alison.com/#