1. In poultry, the genes for rose comb (R) and pea comb (P),...

Name: 1. In poultry, the genes for rose comb (R) and pea comb (P), if present together, produce walnut comb. The recessive alleles of both, when present together in homozygous condition, produce single comb. A rose combed hen crossed with a pea combed rooster produced 5 offspring: 2 with walnut comb, 1 with rose comb and 2 with pea comb. Determine the genotypes of the parents and of the offspring.
Uploaded: 2022-03-22T23:31:27-08:00
Duration: 4 min 29 s
Channel: Shaiju T
Description: 1. In poultry, the genes for rose comb (R) and pea comb (P), if present together, produce walnut comb. The recessive alleles of both, when present together in homozygous condition, produce single comb. A rose combed hen crossed with a pea combed rooster produced 5 offspring: 2 with walnut comb, 1 with rose comb and 2 with pea comb. Determine the genotypes of the parents and of the offspring.

1. In poultry, the genes for rose comb (R) and pea comb (P), if present together, produce walnut comb. The recessive alleles of both, when present together in homozygous condition, produce single comb. A rose combed hen crossed with a pea combed rooster produced 5 offspring: 2 with walnut comb, 1 with rose comb and 2 with pea comb. Determine the genotypes of the parents and of the offspring.

Transcript

00:01 Hello students, today's question is about in the poultry, if the rose comb, which is demonstrated by r and p -combe by p, so whenever they are together, when they are together, so they will produce the walnut com.

00:15 Now talking about when a recessive form of both parent -present together, they form the single com.

00:21 Now, they produced when roscombe and the p -combe crossed together, they produced five whops springs in total.

00:28 Two were walnut which is a combination of both two were p and one was rose so next we have to find the genotype of parent and offspring genotype of parent and offspring so let's take the look at the answer now so we know that rose comb rose so it is hen here and p combe p combe which is a rooster, which is a rooster, which is male.

01:02 So this is female.

01:04 They produced different off -springs.

01:06 Different off -springs.

01:07 Now, for parental genotype, we know that if it is recessive, it forms the single comb.

01:14 Single combe in case of recessive.

01:18 So, if we talk about the rose comb, rose -com and the p -com.

01:26 Now, for rose -combe, the parental genot have to be parental genotype have to be rrpp.

01:34 And for walnut and for the and for the p -com rooster have to be r -r -r -p -p.

01:44 So it needs to be hetero.

01:46 It needs to be hetero with the recessive character.

01:49 That is why only then they will form the walnut.

01:53 Only then they will form the walnut.

01:55 Now if we have if we have gametes, if we have.

02:00 Have gamets of them now they are going to be r p and then r p here and here r p and r p so these are the gamets now we will make the pannot square we will make the penned square to know about the to know about the off springs and so let's take the look at the options what options we will get so, hence, here put the rp here and this rp...

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