How many genotypes are possible as the result of a cross between 2 gametes that are heterozygous?
Thus, according to Mendel’s principles, a dihybrid cross between two heterozygous fruit flies with brown bodies and red eyes (BbEe X BbEe) should yield offspring with nine possible genotypes (BBEE, BBEe, BBee, BbEE, BbEe, Bbee, bbEE, bbEe, and bbee) and four possible phenotypes (brown body with red eyes, brown body …
How many different types of gametes would be produced by an organism of genotype AaBbCcDdEe if all of the genes assort independently?
The number of different possible gametes produced by the diploid genotype (AaBbCcDdEe) is 2 x 2 x 2 x 2 x 2 = 32 (2 for each pair of heterozygous genes).
How many gametes will each parent produce?
There are two types of gametes will each parent produce and that is either recessive or dominant.
How many kinds of gametes can the mother produce?
Since each parent has four different combinations of alleles in the gametes, there are sixteen possible combinations for this cross.
How many different gametes can an RrYy parent form?
A parent with RrYy genotype can produce four gametes: RY, Ry, rY, and ry.
How many kinds of genotypes will be produced in the cross?
These four genotypes can produce one, two, two, and four different gametes, respectively (Table 3). Moreover, in combination with the single gamete from the “tester” parent, these gametes will produce one, two, two, or four progeny phenotypes.
How many types of gametes can be produced by a diploid organism with genotype AaBbCcDd?
Hints For Biology 101 Exam #4
|No. of homologous chromosome pairs (heterozygous genes)||No. of different gametes from each parent|
|2 (AaBb X AaBb)||4 (22)|
|3 (AaBbCc X AaBbCc)||8 (23)|
|4 (AaBbCcDd X AaBbCcDd)||16 (24)|
|20 pairs of chromosomes||1,048,576 (220)|
How many possible genotypes are there among the offspring?
Genotype is also used to refer to the pair of alleles present at a single locus. With alleles ‘A’ and ‘a’ there are three possible genotypes AA, Aa and aa. With three alleles 1, 2, 3 there are six possible genotypes: 11, 12, 13, 22, 23, 33. First we must appreciate that genes do not act in isolation.