In chickens, comb shape is determined by alleles at two loci (R, r and P, p). A walnut comb is produced when at least one dominant allele R is present at one locus and at least one dominant allele P is present at a second locus (genotype R_ P_). A rose comb is produced when at least one dominant allele is present at the first locus and two recessive alleles are present at the second locus (genotype R_pp). A pea comb is produced when two recessive alleles are present at the first locus and at least one dominant allele is present at the second (genotype rrP_). If two recessive alleles are present at the first and at the second locus (rrpp), a single comb is produced. Which of the following cross would produce ½ walnut and ½ pea comb ?

#Question id: 4828

#Unit 8. Inheritance Biology

Consider two pairs of alleles, G/g and H/h, that follow complete dominance inheritance. The initial cross consisted of GG hh males and gg HH females, and the F I female progeny were test crossed with gg hh males to produce 380 Gghh progeny out of 1000 total progeny. What is approximate distance between Gene G and H.

#Question id: 4829

#Unit 8. Inheritance Biology

Plant with genotype AaBb is selfed . the two gene are linked and are 50 map units apart. What proportion of progeny will have the genotype aabb?

#Question id: 4830

#Unit 8. Inheritance Biology

Blue flower is dominant over white flower and long pollen is dominant over short pollen. A pure line plant with Blue flower and long pollen was cross with white flower and short pollen. F1 plant was allowed to test cross to produced numerous Offspring in following number

Blue flower and long pollen            2000

Blue flower and short pollen             500

White flower and long pollen            500    

White flower and short pollen         2000

What is approximate distance between Flower color gene and pollen length gene?

#Question id: 4831

#Unit 8. Inheritance Biology

There are 4 pairs of chromosomes in a Drosophila.The linkage groups present in it are

#Question id: 4832

#Unit 8. Inheritance Biology

Percentage of crossing over is more when

#Question id: 4833

#Unit 8. Inheritance Biology

If the percentage of chance of crossing over between two genes is10, then the distance between two genes will be